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Academic literature on the topic 'Mie resonators'

Author: Grafiati
Published: 10 March 2023
Last updated: 25 May 2024

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Journal articles on the topic "Mie resonators"

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Lubatsch, Andreas, and Regine Frank. "Quantum Many-Body Theory for Exciton-Polaritons in Semiconductor Mie Resonators in the Non-Equilibrium." Applied Sciences 10, no. 5 (March 6, 2020): 1836. http://dx.doi.org/10.3390/app10051836.

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We implement externally excited ZnO Mie resonators in a framework of a generalized Hubbard Hamiltonian to investigate the lifetimes of excitons and exciton-polaritons out of thermodynamical equilibrium. Our results are derived by a Floquet-Keldysh-Green’s formalism with Dynamical Mean Field Theory (DMFT) and a second order iterative perturbation theory solver (IPT). We find that the Fano resonance which originates from coupling of the continuum of electronic density of states to the semiconductor Mie resonator yields polaritons with lifetimes between 0.6 ps and 1.45 ps. These results are compared to ZnO polariton lasers and to ZnO random lasers. We interpret the peaks of the exciton-polariton lifetimes in our results as a sign of gain narrowing which may lead to stable polariton lasing modes in the single excited ZnO Mie resonator. This form of gain may lead to polariton random lasing in an ensemble of ZnO Mie resonators in the non-equilibrium.
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Koshelev, Kirill, Sergey Kruk, Elizaveta Melik-Gaykazyan, Jae-Hyuck Choi, Andrey Bogdanov, Hong-Gyu Park, and Yuri Kivshar. "Subwavelength dielectric resonators for nonlinear nanophotonics." Science 367, no. 6475 (January 16, 2020): 288–92. http://dx.doi.org/10.1126/science.aaz3985.

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Subwavelength optical resonators made of high-index dielectric materials provide efficient ways to manipulate light at the nanoscale through mode interferences and enhancement of both electric and magnetic fields. Such Mie-resonant dielectric structures have low absorption, and their functionalities are limited predominantly by radiative losses. We implement a new physical mechanism for suppressing radiative losses of individual nanoscale resonators to engineer special modes with high quality factors: optical bound states in the continuum (BICs). We demonstrate that an individual subwavelength dielectric resonator hosting a BIC mode can boost nonlinear effects increasing second-harmonic generation efficiency. Our work suggests a route to use subwavelength high-index dielectric resonators for a strong enhancement of light–matter interactions with applications to nonlinear optics, nanoscale lasers, quantum photonics, and sensors.
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Xu, Rongyang, and Junichi Takahara. "Highly sensitive and robust refractometric sensing by magnetic dipole of Si nanodisks." Applied Physics Letters 120, no. 20 (May 16, 2022): 201104. http://dx.doi.org/10.1063/5.0091862.

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Silicon metasurfaces have been attracting interest in the sensing field because of their ability to support magnetic Mie resonance, low optical heating, and CMOS-compatible fabrication processes. Herein, we demonstrate that the sensitivity of the magnetic dipole (MD) mode for nanodisk Mie resonators (as high as 385 nm/RIU) is similar to the sensitivity of plasmonic metasurfaces and greater than that of the electric dipole (ED) mode of nanodisk Mie resonators. We also engineer the thickness of Mie resonators to achieve an MD-mode linewidth as small as 0.56 nm and a figure of merit greater than 160 RIU−1. The measured sensitivity of the MD mode is more accurate than that of the ED mode, which is more prone than the MD mode to measurement errors arising from the partial filling of the liquid. Our study paves the way for the development of MD-mode-based dielectric biosensors for use in personal healthcare and medical diagnosis.
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Syubaev, Sergey, Eugeny Mitsai, Sergey Starikov, and Aleksandr Kuchmizhak. "Laser-printed hemispherical silicon Mie resonators." Optics Letters 46, no. 10 (May 10, 2021): 2304. http://dx.doi.org/10.1364/ol.425809.

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Lan, Jun, Yunpeng Liu, Tao Wang, Yifeng Li, and Xiaozhou Liu. "Acoustic coding metamaterial based on non-uniform Mie resonators." Applied Physics Letters 120, no. 16 (April 18, 2022): 163501. http://dx.doi.org/10.1063/5.0071897.

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Acoustic coding metamaterials have important applications in simplifying design procedure and providing a flexible approach to realize complicated functions. Here, we design a 1-bit coding metamaterial for flexibly manipulating the sound propagation path. The capability of subwavelength acoustic propagation control on coding metamaterial is attributed to the dipole-like characteristic of the Mie resonator. The Mie resonator with a subwavelength scale is constructed with a non-uniform structure, which can generate Mie resonance with dipole-like characteristic. Two kinds of coding elements are introduced by horizontally or vertically reversing the Mie resonator in each element. To verify the performance of the designed coding metamaterials, three specific metamaterial patterns are fabricated to give different trajectories of sound propagation. Our finding may open an avenue for designing acoustic metamaterials and is expected to design intelligent acoustic devices with exciting reconfigurable and programmable applications.
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Lewi, Tomer, Nikita A. Butakov, and Jon A. Schuller. "Thermal tuning capabilities of semiconductor metasurface resonators." Nanophotonics 8, no. 2 (November 28, 2018): 331–38. http://dx.doi.org/10.1515/nanoph-2018-0178.

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AbstractMetasurfaces exploit optical phase, amplitude, and polarization engineering at subwavelength dimensions to achieve unprecedented control of light. The realization of all dielectric metasurfaces has led to low-loss flat optical elements with functionalities that cannot be achieved with metal elements. However, to reach their ultimate potential, metasurfaces must move beyond static operation and incorporate active tunability and reconfigurable functions. The central challenge is achieving large tunability in subwavelength resonator elements, which requires large optical effects in response to external stimuli. Here we study the thermal tunability of high-index silicon and germanium semiconductor resonators over a large temperature range. We demonstrate thermal tuning of Mie resonances due to the normal positive thermo-optic effect (dn/dT>0) over a wide infrared range. We show that at higher temperatures and longer wavelengths, the sign of the thermo-optic coefficient is reversed, culminating in a negative induced index due to thermal excitation of free carriers. We also demonstrate the tuning of high-order Mie resonances by several linewidths with a temperature swing of ΔT<100 K. Finally, we exploit the large near-infrared thermo-optic coefficient in Si metasurfaces to realize optical switching and tunable metafilters.
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Ding, Lu, Ye Feng Yu, Dmitry Morits, Mingbin Yu, Thomas Y. L. Ang, Hong-Son Chu, Soon Thor Lim, Ching Eng Png, Ramon Paniagua-Dominguez, and Arseniy I. Kuznetsov. "Low loss waveguiding and slow light modes in coupled subwavelength silicon Mie resonators." Nanoscale 12, no. 42 (2020): 21713–18. http://dx.doi.org/10.1039/d0nr05248e.

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Naffouti, Meher, Thomas David, Abdelmalek Benkouider, Luc Favre, Antoine Ronda, Isabelle Berbezier, Sebastien Bidault, Nicolas Bonod, and Marco Abbarchi. "Fabrication of poly-crystalline Si-based Mie resonators via amorphous Si on SiO2dewetting." Nanoscale 8, no. 5 (2016): 2844–49. http://dx.doi.org/10.1039/c5nr07597a.

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Chen, Shengqiong, Longjie Li, Feng Jin, Cheng Lu, Shengjie Zhao, Jiebin Niu, and Lina Shi. "Low threshold lasing from silicon Mie resonators." Optics & Laser Technology 148 (April 2022): 107762. http://dx.doi.org/10.1016/j.optlastec.2021.107762.

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Zeng, Lizhen, Yuting Yang, and Gongli Xiao. "An All-Dielectric Color Filter, with a Wider Color Gamut." Photonics 9, no. 10 (September 21, 2022): 680. http://dx.doi.org/10.3390/photonics9100680.

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Due to their extraordinary abilities to manipulate light propagation at the nanoscale, dielectric resonators that generate electric and magnetic Mie resonances for minimal optical loss have recently attracted great interest. Based on an all-dielectric metasurface, made of H-type silicon nanoarrays, this study proposed and constructed a visible-wavelength-range color filter, with high-quality Mie resonance and the ability to synthesize new colors. Using the finite-difference time-domain (FDTD) approach, we can create a larger color gamut by modifying the H-type array’s structural properties. The all-dielectric color filter suggested has a high color saturation and narrow bandwidth. The Mie resonance can be adjusted by manipulating the structural characteristics. By translating the reflectance spectrum into color coordinates and using the CIE1931 chromaticity diagram, a wide range of colors can be generated. This color filter offers a larger color range and saturation than other color filters. We produced color passband filters that span the visible spectrum using Mie resonator arrays, based on an H-type nanoresonator. This technology could have many applications, including high-resolution color printing, color-tunable switches, and sensing systems.
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Dissertations / Theses on the topic "Mie resonators"

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Colom, Remi. "Theoretical and experimental study of optical resonances in dielectric Mie resonators to enhance light-matter interactions." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18811.

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Subwavelength scatterers made of dielectric or semiconductor materials such as silicon and possessing a large refractive index have recently emerged as a good platform to enhance light-matter interactions through the excitation of Mie resonances. In the scope of this thesis, we studied the interaction between light and high refractive index scatterers from both a theoretical and experimental point of view. In particular, we theoretically studied resonances of high-refractive index scatterers in the framework of the multipolar basis. We started by determining the conditions that maximize the scattering or absorption of light by particles. We then performed a theoretical study based on the eigen-modes of the optically resonant particles. In particular, we demonstrated that besides a resonant term, the scattered field has a non-resonant contribution. We finally combined theory with experiments to show that the Mie resonances permit to enhance the nonlinear effects, and in particular four-wave mixing, in silicon nanodisks.
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Khoury, Mario. "Silicon-based light emitters towards quantum devices at telecom frequency." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0364.

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L'objectif de cette thèse est d'explorer le potentiel des impuretés complexes de carbone dans le silicium (G-centers) pour des applications dans les technologies quantiques. Ce défaut ponctuel a été initialement mis en évidence dans des échantillons de Si riches en carbone soumis à une irradiation électronique à haute énergie suivie d'un recuit à haute température. Une caractéristique clé des centers-G est leur émission infrarouge, correspondant à l'importante longueur d'onde de la bande O des télécommunications optiques qui s'étend entre 1260-1360 nm. Nous avons démontré que nous sommes capables de créer des centres G individuels par implantation ionique dans du SOI, du 28Si isotopiquement purifié sur isolant, et des nanostructures photoniques telles que des résonateurs diélectriques de Mie vers des sources intégrées de photons uniques dans le silicium émettant dans la gamme de longueur d'onde des télécommunications. Par lithographie optique et de gravure au plasma, associée à un démouillage à l'état solide de silicium cristallin ultra-mince sur isolant, afin de former des résonateurs de Mie monocristallins. En intégrant des centres G émetteurs de lumière dans les antennes en Si, j'ai conçu l'émission de lumière en réglant la dose de carbone, l'énergie du faisceau et la taille des îlots afin d'optimiser le couplage entre les émetteurs et les résonances de Mie. L'émission de lumière directionnelle à 120 K a été démontrée expérimentalement et confirmée par des simulations FDT. Nous estimons qu'avec un couplage optimal de l'émission des centres G avec les antennes résonantes, une efficacité de collecte d'environ 90 % peut être atteinte en utilisant un objectif conventionnel
The aim of this thesis it to explore the potential of complex carbon impurities in silicon (G-centers) for applications in quantum technologies. This point defect was originally highlighted in carbon-rich Si samples undergoing high-energy electron irradiation followed by high temperature annealing. A key feature of G-centers is their infrared emission, matching the important optical telecommunications wavelength O-band spreading between 1260-1360 nm. Through my PhD work we have demonstrated that we are able to create individual G-centers by ion implantation in conventional silicon on insulator, isotopically purified 28Si on insulator, and embed these emitters in photonic nanostructures such as dielectric Mie resonators. We developed a low-resolution optical lithography and plasma etching method joined with solid state dewetting of monocrystalline, ultra-thin, silicon on insulator to form monocrystalline, atomically-smooth, Mie resonators in well-controlled and large, periodic arrays.By integrating light emitting G-centers within the Si-based antennas we engineered the light emission by tuning carbon dose, beam energy and islands size in order to optimize the coupling between the emitters and the Mie resonances in space and frequency. directional (Huygens-like) light emission at 120 K was demonstrated experimentally and confirmed by finite difference time domain simulations. We estimate that, with an optimal coupling of the G-centers emission with the resonant antennas, a collection efficiency of about 90% can be reached using a conventional objective lens
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TOLIOPOULOS, DIMOSTHENIS. "Single photon sources integrated on Ge Mie resonator fabricated by solid state dewetting." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2021. http://hdl.handle.net/10281/311361.

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The following Ph.D. thesis summarizes the work that has been made aiming at the fabrication and characterization of quantum emitters integrated inside Ge nanoisland on Si substrates. We choose to induce localized Ge impurities centers inside a thin layer of Al0.25Ga0.75As epitaxially grown on Ge islands acting as dielectric Mie Resonators (MR’s). These centers are working as light sources, capable of single photon emission and quantum entanglement properties. Fabrication of the Ge islands was done by solid state dewetting in an ultra-high vacuum environment, obtaining both amorphous and monocrystalline islands, with sizes ranging from 50 to 500 nm. These islands are also photonic Mie-resonators enhancing light-matter interaction and steering the localized defects emission, acting as dielectric nanoantennas. This thesis exploits molecular beam epitaxy, solid state dewetting and electron assisted lithography for realizing patterned samples. Many different characterization methods have been used to assess the quality of the fabricated samples. We use morphological characterization via scanning electron microscopy (SEM) and atomic force microscopy (AFM). Optically, we characterized the Mie resonators by dark field (DF) spectroscopy to ensure their photonic mode appearance. Also, the crystallinity of the Ge seeds was investigated by RAMAN spectroscopy. In the end, the optical response of the samples will be tested by micro and macro Photoluminescence, time-resolved measurements, and auto-correlation measurements to assess the quantum nature of the emission at low temperatures. Towards our goal we faced three main different topics: i) the growth of Ge nanoisland via solid state dewetting, ii) the optimization of the photonic response of semiconductor Mie resonators by engineering the geometry of the substrates, iii) the integration of III-V layers on Ge islands and the observation of interesting associated defects. Each of these aspects is described in detail in chapters 3,4 and 5. During my secondments at UNIFI, I had also been involved in a quite different approach towards the deterministic realization of quantum emitters integrated beneath a glass nanoantenna, an activity which led to article submission, but it is not reported in this thesis.
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Palaferri, Danièle. "Antenna resonators for quantum infrared detectors and fast heterodyne receivers." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC083/document.

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Ce travail de thèse porte sur la conception et la réalisation de méta-structures pour l’amelioration des performances de détecteurs dans les gammes spectrales du moyen infrarouge et du térahertz (THz). Ces méta-structures sont des matrices de résonateurs métalliques qui actent aussi comme antennes, permettant une meilleure collection des photons et un plus fort confinement du champ électrique. Dans ce manuscrit, j’examine les résultats expérimentaux concernant deux photo-detecteurs infrarouges à puits quantiques (QWIP) résonants à une longueur d'onde de 55.5 µm (5.4 THz) et de 8.6 µm, implémentés dans des réseaux d’antennes patch. La responsivité, la détectivité et les performances thermiques des dispositifs en microcavité sont systématiquement comparées au même détecteur fabriqué en géométrie standard ‘mesa’, pour lequel le rayonnement infrarouge est couplé par le substrat. La cohérence du modèle est évaluée en comparant le gain photoconducteur de chaque structure QWIP. Dans le moyen infrarouge, le fonctionnement à température ambiante avec une source de radiation thermique est démontré pour la première fois. De plus, en exploitant la courte durée de vie des porteurs dans la zone de QWIP, une détection hétérodyne à température ambiante a été démontrée jusqu’aux fréquences de quelques GHz, limitée uniquement par la fréquence de coupure du circuit externe. Dans la dernière partie de ce manuscrit, plusieurs perspectives sont discutées concernant des structures de détecteurs quantiques couplés à la géométrie de résonateurs patch et des architectures inspirées des métamateriaux, avec la perspective d’améliorer davantage les performances des photodétécteurs
The present thesis manuscript is about the conception and the realisation of metastructures for the improvement of detector performances in the mid-infrared and terahertz (THz) spectral ranges. These meta-structures are arrays of metal resonators that also act as antennas, allowing a better collection of photons and a stronger confinement of the electric field. In this manuscript, I examine the experimental results regarding a 55.5 µm (5.4 THz) and a 8.6 µm quantum well infrared photodetectors (QWIP), implemented into patch-antennae arrays. The responsivity, the specific detectivity and the thermal performances of the antenna-coupled devices are systematically compared to the same detector processed in standard substrate-coupled ‘mesa’ geometry. In the mid-infrared, the room temperature operation using a thermal radiation source is reported for the first time. Moreover, exploiting the short carrier lifetime in semiconductor quantum wells, a room temperature heterodyne detection is demonstrated, at frequencies up to few GHz, limited only by the cut-off frequency of the external circuit. In the last part of this work, several perspectives are discussed, regarding alternative quantum detector structures coupled to the patch resonators geometry and innovative circuit-like plasmonic architectures, envisioning orders of magnitude improvement in photodetector performances
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Omeis, Fatima. "Theorical and experimental study of plasmonic metamaterials for infrared application." Thesis, Université Clermont Auvergne‎ (2017-2020), 2017. http://www.theses.fr/2017CLFAC041/document.

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Le contrôle des ondes électromagnétiques joue un rôle fondamental dans les technologies photoniques actuelles. De nos jours, on assiste à une demande croissante de composants agiles capable d'absorber efficacement les ondes électromagnétiques dans divers gamme de fréquences. Habituellement, ces absorbeurs s'appuient sur les résonances plasmoniques qui apparaissent dans les métaux nobles dans la gamme visible. Cependant, l'extension des propriétés plasmoniques aux spectres infrarouge et THz nécessite des matériaux adéquats ayant un comportement métallique à ces fréquences. Dans ce travail, nous étudions numériquement et expérimentalement les structures métal-isolant-métal (MIM) réalisées à partir de semi-conducteur hautement dopé Si: InAsSb qui a un comportement métallique dans la gamme infrarouge. Dans la deuxième partie, nous avons amélioré l'efficacité des résonateurs MIM en utilisant des métamatériaux hyperboliques qui miniaturisent les résonateurs. Dans la dernière partie, nous proposons un design universel ultra-mince qui permet de dépasser les contraintes associées au choix des matériaux et permettant la réalisation d'un absorbeur fonctionnant sur une gamme spectrale allant de l'infrarouge aux micro-onde
The control of light absorbance plays a fundamental role in today's photonic technologies. And the urge to design and develop flexible structures that can absorb electromagnetic waves is very growing these days. Usually, these absorbers relies on plasmonic resonances that arise in noble metals in the visible range. However, the extension of the plasmonic properties to the infrared and THz spectra requires adequate materials that have a metallic behavior at these frequencies. In this work, we study numerically and experimentally the metal-insulator-metal (MIM) structures realized from highly doped semiconductor Si:InAsSb that has a metallic behavior in the infrared range. In the second, part we improved the efficiency of the MIM resonators by using hyperbolic metamaterials that also miniaturize the resonators. In the last part, we propose an ultra-thin universal design that overcomes the material barrier so that the total absorption can be achieved for different spectral ranges without changing the material
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John, Jimmy. "VO2 nanostructures for dynamically tunable nanophotonic devices." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI044.

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L'information est devenue le bien le plus précieux au monde. Ce mouvement vers la nouvelle ère de l'information a été propulsé par la capacité à transmettre l'information plus rapidement, à la vitesse de la lumière. Il est donc apparu nécessaire de mener des recherches plus poussées pour contrôler plus efficacement les supports d'information. Avec les progrès réalisés dans ce secteur, la plupart des technologies actuelles de contrôle de la lumière se heurtent à certains obstacles tels que la taille et la consommation d'énergie et sont conçues pour être passives ou sont limitées technologiquement pour être moins actives (technologie Si-back). Même si rien ne voyage plus vite que la lumière, la vitesse réelle à laquelle les informations peuvent être transportées par la lumière est la vitesse à laquelle nous pouvons la moduler ou la contrôler. Ma tâche dans cette thèse visait à étudier le potentiel du VO2, un matériau à changement de phase, pour la nano-photonique, avec un accent particulier sur la façon de contourner les inconvénients du matériau et de concevoir et démontrer des dispositifs intégrés efficaces pour une manipulation efficace de la lumière à la fois dans les télécommunications et le spectre visible. En outre, nous démontrons expérimentalement que les résonances multipolaires supportées par les nanocristaux de VO2 (NC) peuvent être réglées et commutées dynamiquement en exploitant la propriété de changement de phase du VO2. Et ainsi atteindre l'objectif d'adaptation de la propriété intrinsèque basée sur le formalisme de Mie en réduisant les dimensions des structures de VO2 comparables à la longueur d'onde de fonctionnement, créant un champ d'application pour un métamatériau accordable défini par l'utilisateur
Information has become the most valuable commodity in the world. This drive to the new information age has been propelled by the ability to transmit information faster, at the speed of light. This erupted the need for finer researches on controlling the information carriers more efficiently. With the advancement in this sector, majority of the current technology for controlling the light, face certain roadblocks like size, power consumption and are built to be passive or are restrained technologically to be less active (Si- backed technology). Even though nothing travels faster than light, the real speed at which information can be carried by light is the speed at which we can modulate or control it. My task in this thesis aimed at investigating the potential of VO2, a phase change material, for nano-photonics, with a specific emphasis on how to circumvent the drawbacks of the material and to design and demonstrate efficient integrated devices for efficient manipulation of light both in telecommunication and visible spectrum. In addition to that we experimentally demonstrate the multipolar resonances supported by VO2 nanocrystals (NCs) can be dynamically tuned and switched leveraging phase change property of VO2. And thus achieving the target tailoring of intrinsic property based on Mie formalism by reducing the dimensions of VO2 structures comparable to the wavelength of operation, creating a scope for user defined tunable metamaterial
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Matsuoka, Yohei. "Broadly Tunable External Cavity Quantum Cascade Lasers." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21073.

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Mitt-Infrarot-Technologie (mid-IR) ist ein äußerst leistungsfähiges Werkzeug für die Anwendung in der Molekülspektroskopie, da die Schwingungsmoden vieler Moleküle in diesem Wellenlängenbereich liegen. Der Quantenkaskadenlaser mit externem Resonator (EC-QCL) kann alle Bereiche dieses Spektrums abdecken. Das Hauptanliegen dieser Arbeit ist die Verbesserung der Leistung des EC-QCL im Hinblick auf die Breite des Wellenlängen-Durchstimmbereichs und die Laserleistung. Theoretische Untersuchungen bestätigen zunächst, dass der QCL die Schlüsselrolle bei EC-Systemen einnimmt: Die Effizienz des EC wird bestimmt durch die Effizienz des QCL und die Güte der Antireflex-Schicht (ARC) der Laserfacette. Die Breite des Durchstimmbereichs wird bestimmt durch das Gain-Spektrum des QCL. Im Rahmen dieser Arbeit wurden die QCL in unserer Gruppe hergestellt und vom QCL-Wachstum selbst bis hin zur Facettenbeschichtung optimiert. Eine der größten Herausforderungen in der Herstellung des EC-Systems ist die Reduktion des Reflexionsvermögens innerhalb der Facetten des Laserchips. Dafür haben wir ein neues ARC-Konzept entwickelt und auf dem beschichteten Substrat demonstriert, dass innerhalb des gesamten, sehr breiten Wellenlängenbereichs von 7–12 μm die Reflexion auf unter 1% reduziert wird. Das Beschichtungsmodell wurde außerdem auf „broad-gain“-QCL-Facetten angewendet, wodurch die Reflexion auf 0,75% über den gesamten Emissions-Wellenlängenbereich reduziert werden konnte. Ein weiterer Schwerpunkt dieser Arbeit ist die Entwicklung und Konstruktion von EC-Lasersystemen. Es wurden zwei kompakte Laser vom Littrow-Typ entwickelt, die von 920 cm-1 bis 1190 cm-1 durchstimmbar sind und die eine Pulsleitung von 0.45 W erreichen. Außerdem wurde eine neue optische Konfiguration des EC-Systems vorgeschlagen um eine höhere Ausgangsleistung zu erzielen. Dieser „Intra-cavity Out-coupling Laser“ erreicht eine Pulsleistung von 1 W und den gleichen Emissionbereich wie die beiden Littrow-Laser.
Mid-infrared (mid-IR) technology is a very powerful tool for molecular spectroscopy since vibration modes of many molecules lie in this wavelength range. The External-Cavity Quantum Cascade Laser (EC-QCL) can cover any part of this spectral range. The main goal of this study is to improve EC-QCL performance in terms of wavelength tunability and laser power. The theoretical study about Quantum Cascade Laser (QCL) and EC systems has confirmed that the QCL plays the core role of EC-QCL systems; the power efficiency of an EC system is determined by the combination of the power efficiency of QCL and AR-coating of the laser facet. The width of the tuning range is determined by the gain spectrum of QCL. During this work, QCLs have been fabricated in our group and the optimization of these factors were carried out with various approaches, from QCL growth to facet coatings. One of the major challenges in making EC systems is to reduce the intra-facet reflectivity of the laser chip, and we first proposed a new anti-reflection (AR) coating concept and demonstrated its performance for the first time to the community, achieving good reduction of reflection of the AR-coated substrate over 7-12 μm range, keeping below R < 1% reflection over the entire spectrum. The coating model was applied on broad-gain QCL facets, and the reflection was reduced to 0.75% over the entire emission wavelength range. Furthermore, this work focused on the development and engineering of laser systems, and two compact Littrow-type lasers and an EC system with a new optical configuration have been developed, achieving good performances; tunable from 920 cm-1 to 1190 cm-1 and 0.45 W pulse power. The new type of laser, an Intra-cavity out-coupling EC laser, was also proposed to enhance the power output and achieved over 1 W pulse power with keeping the same tuning range as the Littrow-type.
中赤外分光の技術は非常に有用である。これはとりわけ多くの分子振動モードがこの波長帯域に存在しているためである。可変長レーザーである外部共振器量子カスケードレーザー(External cavity quantum cascade laser, EC-QCL)は、これらスペクトル領域を網羅することが可能で、したがって、EC-QCLは産業スケールを含めた、標準的な光源として非常に潜在的である。商品化のフェーズをさらに推し進めるため、このレーザー性能におけるボトムアップの技術が求められてる。 多くの中赤外光のアプリケーションには広帯域の光源が求められている。この研究はおもにそうした性能を最大化することを背景としている。具体的な目的としては、波長の変調性および光源の強度の向上である。これらの目的に取り組むため、我々はいくつかの段階にステージ化して研究を進めてきた。まず初めに、QCLおよびEC-QCLの基本的な特性の追求から始めた。QCLおよびEC-QCLの物理機構の理論的な考察を行い、これらからEC-QCL形態における要素の最適条件もしくは要請を求めた。QCL素子が、その主要な部位であり、EC系におけるほとんどの性能特性である量子効率、変調領域幅、増幅器の光学損失を決定する。 さまざまなアプローチによりこれら緒特性の最適化が行われた。 この研究のなかで、我々グループ内でシステムの心臓となるQCL素子の全製造プロセス(結晶成長から素子コーティングに至るまで)をおこなった。これら製造手順および性能特性の詳細もまた本論文に記す。 ECレーザーにおける要請特性の中で特に困難な課題として、レーザー素子の内部断面(intra-facet)の反射率の低減があげられる。これに応じるものとして、我々は新たな反射防止膜のコンセプトで、特に中赤外光領域に有益なものを提案した。この実現のために、様々な誘電体物質の光学特性を調べ、中赤外光の応用に最適なものを選択し、実際のコーティングに応用した。ここで提案されたモデル``quasi-Lockhart'' (疑ロックハート)のコーティングは、実験によりその高い性能が実証された。波長7–12 μmの領域をカバーし、かつその全領域内で反射率を1%以下に抑えることができた。またこのコーティングは広帯域ゲインのチップにも施され、その反射率を全体域をカバーしながら、0.75%まで低減させた。この成果はEC-QCLだけでなく、一般の中赤外光の光学コーティングにおいても大いに有用であろう。 さらに、我々は本研究の中でレーザーシステムの構築にも取り組んだ。この研究のなかで、二台のLittrow型レーザーと、新たな光学系をもつECレーザーを構築し、その高性能性を実証した。Littrow型では920 cm-1-1190 cm-1の帯域とパルス強0.45 Wを達成。新たなレーザーシステムであるIntra-cavity out-coupling系は従来の系にくらべ高出力することを目的とされ、その帯域を維持しながら、パルス強1~Wの出力を達成した。またこれら新たなシステムを用いて、またプロジェクトバートナーとの食道癌の細胞イメージングも試験、およびグループにおいてアンモニアの吸光度測定を実施した。
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Checcucci, Simona. "Mie resonators for photonic applications at optical frequencies." Doctoral thesis, 2019. http://hdl.handle.net/2158/1153128.

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Dielectric particles exhibiting resonant Mie scattering have been under investigation in the last few years owing to their remarkable optical properties in the visible and near-infrared wavelength range, representing a promising resource for light manipulation at the nanoscale. In this thesis we focus our study on different, novel and alternative methods of fabrication for realizing single Mie resonators as well as metasurfaces. All these approaches address the challenge of low cost and scalability. Beside the fabrication aspects we also deeply investigate the optical response and the possible use of these systems for several different applications.
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Books on the topic "Mie resonators"

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Michael, Michael G. Tunable MMIC and MIC ring resonator oscillators and filters. Manchester: UMIST, 1998.

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IEEE-Russia Conference on High Power Microwave Electronics--Measurements, Identification, Applications (1997 Novosibirsk, Russia). 1997 High Power Microwave Electronics--measurements, identification, application: MIA-ME '97, Novosibirsk, Russia, September 23-25, 1997. Piscataway, NJ: Institute of Electrical and Electronics Engineers, 1997.

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Chapter, IEEE Joint MTT/ED/CPMT/COM, IEEE Microwave Theory and Techniques Society., Novosibirskiĭ gosudarstvennyĭ tekhnicheskiĭ universitet, and IEEE-Russia Conference on High Power Microwave Electronics (2nd : 1999 : Novosibirsk, Russia), eds. 1999 High power microwave electronics: Measurements, identification, applications, MIA-ME'99 : proceedings of the IEEE-Russia conference : September 21-23, 1999, Novosibirsk, Russia. [Novosibirsk: Novosibirsk State Technical University, 1999.

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IEEE-Russia Conference on High Power Microwave Electronics--Measurements, Identification, Applications (2nd 1999 Novosibirsk, Russia). 1999 high power microwave electronics: Measurements, identification, applications, MIA-ME'99 : September 21-23, 1999, Novosibirsk, Russia. [Novosibirsk: Novosibirsk State Technical University, 1999.

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1997 High Power Microwave Electronics--measurements, identification, application: MIA-ME '97, Novosibirsk, Russia, September 23-25, 1997. Institute of Electrical and Electronics Engineers, 1997.

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Jarenski, Shelly. “Who Are the Other Potters? What Are Their Names?”. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199390205.003.0016.

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This chapter focuses on Theaster Gates’s 2010 exhibition To Speculate Darkly, which puts Gates’s multimedia work in dialogue with Drake. Jarenski’s chapter engages with the theme of erasure in Gates’s aesthetic and examines the ways that Gates imagined himself as Dave “the Slave” Potter, using Dave’s hyperbolic vessels as the staging area for his own artistic performance. Gates’s work with Dave resonates with the work of other artists, like Kara Walker (inspired by the panorama, the silhouette, and sentimental fiction) and Carrie Mae Weems, who has incorporated ethnographic daguerreotypes into her work. In order for us to fully appreciate the still undertheorized experimental breakthroughs of antebellum black artists, slave and free, this chapter claims that we must recognize the continued influence of nineteenth-century forms on contemporary African American art.
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Fiddian, Robin. Postcolonial Borges. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198794714.001.0001.

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This work considers geopolitical and postcolonial themes in a range of writings by Jorge Luis Borges, analysing the development of a postcolonial sensibility in works such as ‘Mythical Founding of Buenos Aires’, ‘Tlön, Uqbar, Orbis Tertius’, ‘Theme of the Traitor and the Hero’, and ‘Brodie’s Report’. It examines Borges’s treatment of national and regional identity and of East–West relations in several essays and poems, contained, for example, in Other Inquisitions, The Self and the Other, and Seven Nights. The theoretical concepts of ‘coloniality’ and ‘Occidentalism’ shed new light on several works by Borges, who acquires a sharper political profile than previously acknowledged. The book pays special attention to Oriental subjects in Borges’s works of the 1970s and 1980s, where their treatment is bound up with a critique of Occidental values and assumptions. Classified by some commentators as a precursor of postcolonialism, Borges emerges as a prototype of the postcolonial intellectual exemplified by James Joyce, Aimé Césaire, and Edward Said. From a regional perspective, his repertoire of geopolitical and historical concerns resonates with those of Leopoldo Zea, Enrique Dussel, Eduardo Galeano, and Joaquín Torres, amongst others, who illustrate different strands and kinds of Latin American postcolonialism(s) of the mid- to late twentieth century. At the same time, essential differences in respect of political and artistic temperament mark Borges out as a postcolonial intellectual and creative writer who is unquestionably sui generis.
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Gil-Egui, Gisela. E-Government. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190846626.013.162.

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E-government refers to a set of public administration and governance goals and practices involving information and communication technologies (ICTs). It utilizes such technologies to serve public agencies’ external audiences and constituents. However, the scope of that service is the subject of much debate and, consequently, no consensual definition of e-government had been formulated. The prehistory of e-government resonates with assumptions from the “new public management” (NPM), which proposed a restructuring of governmental agencies by adopting a market-based approach to ensure cost efficiencies in the public sector. Coined in the mid-1990s, the notion of e-government as equivalent to better government, economic growth, human development, and the knowledge society in general was quickly and uncritically accepted by practitioners and scholars alike. As scholars from different disciplines, including politics communication and sociology, paid increasing attention to the intersections of structural factors, hardware, and culture in the adoption and use of ICTs, research on e-government began to show some diversification. By the twenty-first century, the number of e-government websites from local and national administrations has grown sufficiently to allow some generalizations based on empirical observation. Meanwhile critical and comprehensive approaches to e-government frequently adopt a critical stance to denounce oversimplifications, determinisms, and omissions in the formulation of e-governance projects, as well as in the evaluation, adoption, and assessment of e-government effectiveness. Beyond the particularities of each emerging technology, reflection on the intersections between ICTs and government is moving away from an exclusive focus on hardware and functionality, to consider broader questions on governance.
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Book chapters on the topic "Mie resonators"

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Satheesh Kumar, P., P. Chitra, and S. Sneha. "Design of Improved Quadruple-Mode Bandpass Filter Using Cavity Resonator for 5G Mid-Band Applications." In Future Trends in 5G and 6G, 219–34. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003175155-11.

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Cassin, Barbara. "Google Inc.: From Search to Global Capital." In Google Me, translated by Michael Syrotinski. Fordham University Press, 2017. http://dx.doi.org/10.5422/fordham/9780823278060.003.0003.

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A playful account of the origins of Google, including a concise explanation of the PageRank algorithm. The history is narrated in a vivid present tense as a capitalist success story, with Sergey Brin and Larry Page as its two adventurer heroes. The chapter resonates with the many different literary and cultural connotations of the name “Google,” particularly in relation to Joyce and the “googly” in cricket.
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Hecker, Sharon. "Internationalism and Experimentation." In Moment's Monument. University of California Press, 2017. http://dx.doi.org/10.1525/california/9780520294486.003.0005.

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This chapter analyzes Medardo Rosso's career in Italy in light of the shifting political climate in the mid- to late 1880s. His increasingly internationalist viewpoint had political and cultural implications that illuminate his career choices as well as the disoriented and fragmented historical moment in Italy and its complex relationship to France. His work was criticized at home during a decade of growing tensions caused by Italy's fragile democratic system and the nationalism of the ruling class and its supporters. This was a delicate time politically, soon after Italy had joined the Triple Alliance with Germany and Austria–Hungary, and imposed trade wars against France. Rosso's early alertness to European prospects resonates with the political currents of progressive democratic internationalism that developed in Italy during the 1880s.
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"Garbage Truck Music and Sustainability in Contemporary Taiwan." In Cultural Sustainabilities, edited by Timothy J. Cooley, 63–74. University of Illinois Press, 2019. http://dx.doi.org/10.5622/illinois/9780252042362.003.0006.

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Garbage in Taiwan is at the center of a musical assemblage that resonates beyond the waste collection soundscape. Taiwanese garbage trucks are musical: Badarzewska's Maiden's Prayer or Beethoven's För Elise announce the brigade's arrival at designated times and pick up locations. Neighbors stream into the street for a turn at depositing their presorted waste into the proper receptacles. Taiwan's semi-tropical climate combined with a densely situated human population, and the presence of well-established rat and cockroach populations, combine to make garbage management a matter of daily urgency. This chapter takes Taiwan's pop music, primarily Mandopop, from the early 1980s through the mid-2010s as evidence of ways in which everyday practices aimed at dealing sustainably with household waste have seeped into a wide range of sensibilities.
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Debost, Michel. "Resonance." In The Simple Flute, 204–6. Oxford University PressNew York, NY, 2002. http://dx.doi.org/10.1093/oso/9780195145212.003.0058.

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Abstract Sound is a vibration of the medium, but it is not vibrato. Sound cannot be produced in a vacuum. It needs a medium— in most cases air, but it can be lighter than air (such as helium), making the pitch sharper, or heavier (such as carbon dioxide), turning the pitch flatter. You can experiment with this phenomenon if you play right after having a carbonated drink. Should an accidental return of the gas occur, your tone suddenly goes very flat, for a second, then comes back up to pitch. The greater density of carbon dioxide (CO2 ) is the reason. The temperature inside the flute also influences resonance. Cold air is denser than hot; therefore, it resonates at a lower frequency. There can be no sound in a vacuum. Correlatively, any air particle in contact with the sound source enters into vibration with it. The volume of air where you are playing resonates, but so do all the cavities inside your body: chest, mouth, throat, sinuses, even bones. They contribute to give each of us a distinctive sound. A cold is unpleasant because the head cavities do not resonate. Our tone of voice is a direct result of the component resonance of our facial spaces. It is the constant emphasis of good voice teachers, and it is mine, for I think the voice is the best example of tone production for flutists.
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Kilcline, Cathal. "Introduction." In Sport and Society in Global France, 1–18. Liverpool University Press, 2019. http://dx.doi.org/10.3828/liverpool/9781781382899.003.0001.

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The representative examples and resources analysed in this book are drawn from 30 years of French sport, from the mid-1980s to the present day, with the Los Angeles Olympics of 1984 considered a pivotal moment in the global evolution of sport as practice and spectacle. In France, this event marked a shift in attitudes towards professional sports as the American model of structuring, financing and mediatising sports became increasingly influential, subsequently facilitated by numerous other factors including deeper European integration and the fall of the Soviet Union. Domestically, 1984 is also remembered in sporting circles for the landmark success of the French ‘rainbow nation squad’ in football’s European Championship, and the creation of a new television channel, Canal+, that invested heavily in sport. These factors combined to make the mid-1980s a watershed in the development of the sporting landscape in France, the impact of which resonates to the present day. This book ends its study in 2017 with the presidential elections of that year marking a profound shift in the politics of the Fifth Republic and with Paris’s nomination as host of the 2024 Olympics set to henceforth dominate the future evolution of France’s sporting landscape.
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Nasrallah, Laura Salah. "On Poverty and Abundance." In Archaeology and the Letters of Paul, 105–40. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199699674.003.0005.

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Even in the mid first century CE, Roman Philippi was still marked by its colonization by Roman veterans from the civil wars at the time of Augustus. One example of this is the cult of the god Silvanus there, a cult rarely attested in the East. The Silvanus cult celebrated its members’ donations, including the small donation of fifteen denarii offered for a painting. The small donations of this cult allow us to investigate poverty and economics in the Roman world. The Letter to the Philippians is full of financial language, indicating complex business ties between Paul and those to whom he wrote. The inscription and the Letter to the Philippians reveal economic engagement at low levels, evidence of the ways in which the less than elite sought to contribute to each other and their God(s). This theological and economic imaginary resonates with critiques of neoliberalism today.
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Verga, Francesca. "Working with Images." In W.G. Sebald’s Artistic Legacies. Nieuwe Prinsengracht 89 1018 VR Amsterdam Nederland: Amsterdam University Press, 2023. http://dx.doi.org/10.5117/9789463729758_ch08.

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Departing from W.G. Sebald’s use of photographic images in Austerlitz (2001) and other writing to reflect on memory and history, this text examines artist Mike Kelley’s use of photography in relation to the reconstruction of memories and the fictional. Kelley’s and Sebald’s practices are here compared in their respective uses of found and repurposed photographs to highlight their play with arbitrary boundaries between the real and imagined. The focus is on Kelley’s monumental work Extracurricular Activity Projective Reconstruction (A Domestic Scene) (2000), which particularly resonates with Sebald’s themes. The American artist was born in 1954, ten years after Sebald, and like the German writer grew up in a Catholic working-class family. While their similarities are striking, beyond this their backgrounds differ greatly. In closing, the text seeks to pinpoint what kind of a contribution to memory studies the imagined dialogue between the word and image practices of Sebald and Kelley could make.
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Ganeri, Jonardon. "Landscapes of Presence." In Virtual Subjects, Fugitive Selves, 78–86. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198864684.003.0011.

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Pessoa provides a rich set of descriptions of the all-inclusive psychological field and its structure. The metaphor that seems to recur most frequently is that of a landscape: ‘Eternal tourists of ourselves, there is no landscape but what we are.’ We have already introduced the idea that experience embeds an implicit ‘for-me’ grammatical place, that is to say that there is a dative of manifestation, a way in which experience presents itself as for-me. Evidently this is what makes a landscape of experience mine. What, though, actually is for-me-ness, the subjective character of experience, the subjective dimension? Marie Guillot states that ‘everyone agrees that subjective character has to do with the fact that the existence of an experience resonates in a particular way with the subject in whom it occurs’. My proposal is to analyse a Pessoan ‘way of feeling’ as a subject-invariant mode of consciousness, a mode of consciousness that is comparatively invariant within and across the experiential life of a given subject, but which varies from one subject to the next.
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Franklin, M. I. "The World around Us." In Sampling Politics, 31–60. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780190855475.003.0002.

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Chapter 2 sets the compass through a work that seems to have little to say about sampling. 4’33” (four thirty-three) by John Cage is based on no (performed) sounds, no flashy pyrotechnics in its execution, nor reverence for the notion of music as a singular, individual creative act, or performance. The chapter considers Cage’s evocation of “silence” as the sampled material that is at stake in this iconic piece. I consider how silence, and silencing work in the context of censorship and social control given that the timeframe for the inception of 4’33” resonates with post-World War II, mid-twentieth-century United States during the Cold War. Engaging with this work can also tell us something about the role of censorship in public arts life half a century later, in the US shortly after the Al Qaeda attacks on September 11, 2001. As I argue, when regarded as a material of music, and thereby as a source from which to “sample” silence, 4’33”offers both a sonic and “sound-less” baseline for the four case studies to follow. “Silence” as rendered in Cage’s work, its wider connotations and evocation of the sensation of sound-filled stillness also serve as a signal for instances of domination, of how oppression can take place quietly, without fanfare. Considering silence as a geocultural, socio-musicological matter allows us a moment to retune our ears and minds by encountering the broader (in)audible domains through, and from which sampling practices take place.
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Conference papers on the topic "Mie resonators"

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Gottardo, S., R. Sapienza, P. D. García, J. Bertolotti, A. Blanco, C. Lopez, and D. S. Wiersma. "Random Laser Action from Mie Resonators." In Photonic Metamaterials: From Random to Periodic. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/meta.2007.thc3.

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Singh, Danveer. "Subwavelength mie-resonant selenium resonators for mid-infrared meta-optics." In Metamaterials, Metadevices, and Metasystems 2021, edited by Nader Engheta, Mikhail A. Noginov, and Nikolay I. Zheludev. SPIE, 2021. http://dx.doi.org/10.1117/12.2597756.

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Boudarham, Guillaume, Brice Roily, Redha Abdeddaim, Jean-Michel Geffrin, Brian Stout, Sebastien Bidault, and Nicolas Bonod. "Manipulating light matter interaction with Mie resonators." In 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. IEEE, 2013. http://dx.doi.org/10.1109/cleoe-iqec.2013.6801883.

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Mohammadi, Ershad, T. V. Raziman, and Alberto G. Curto. "Nanophotonic chirality transfer to dielectric Mie resonators." In CLEO: Applications and Technology. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.jtu3b.41.

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We propose that chirality transfer from chiral molecules to dielectric nanoresonators enhances enantiomer detection. Our approach offers circular dichroism enhancements orders of magnitude stronger than optical chirality-based methods.
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Mohammadi, Ershad, Raziman Thottungal Valapu, and Alberto G. Curto. "Nanophotonic chirality transfer to dielectric Mie resonators." In Metamaterials XIII, edited by Kevin F. MacDonald, Anatoly V. Zayats, and Isabelle Staude. SPIE, 2022. http://dx.doi.org/10.1117/12.2621211.

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Lewi, Tomer, Prasad P. Iyer, Nikita A. Butakov, Alexander A. Mikhailovsky, and Jon A. Schuller. "Widely tunable infrared semiconductor Mie resonators (Conference Presentation)." In Metamaterials, Metadevices, and Metasystems 2016, edited by Nader Engheta, Mikhail A. Noginov, and Nikolay I. Zheludev. SPIE, 2016. http://dx.doi.org/10.1117/12.2237905.

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Sugimoto, Hiroshi, Tatsuki Hinamoto, and Minoru Fujii. "Colloidal silicon mie resonators for all-dielectric nanophotonics." In Metamaterials, Metadevices, and Metasystems 2020, edited by Nader Engheta, Mikhail A. Noginov, and Nikolay I. Zheludev. SPIE, 2020. http://dx.doi.org/10.1117/12.2567145.

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Zalogina, Anastasia, Pavel Tonkaev, Aditya Tripathi, Hoo-Cheol Lee, Luca Carletti, Hong-Gyu Park, Sergey Kruk, and Yuri Kivshar. "Observation of Giant Five-Photon Upconversion Luminescence in Subwavelength AlGaAs Resonators." In CLEO: QELS_Fundamental Science. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_qels.2022.fth4b.5.

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We design and fabricate individual subwavelength AlGaAs nanoantennas supporting Mie resonances in the mid-infrared spectral range. Near the resonant modes, we observe five-photon upconversion photoluminescence in the visible spectral range.
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D'Ambrosio, Davide, Marialuisa Capezzuto, Saverio Avino, Antonio Giorgini, Pietro Malara, and Gianluca Gagliardi. "Solid and liquid whispering-gallery mode microresonators excited via Lorenz-Mie scattering and their applications." In Laser Resonators, Microresonators, and Beam Control XXVI, edited by Andrea M. Armani, Vladimir S. Ilchenko, and Julia V. Sheldakova. SPIE, 2024. http://dx.doi.org/10.1117/12.3005017.

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Lewi, Tomer, Prasad P. Iyer, Nikita A. Butakov, and Jon A. Schuller. "Properties of infrared doped semiconductor Mie resonators (Presentation Recording)." In SPIE Nanoscience + Engineering, edited by Nader Engheta, Mikhail A. Noginov, and Nikolay I. Zheludev. SPIE, 2015. http://dx.doi.org/10.1117/12.2187292.

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