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Littérature scientifique sur le sujet « Mie resonator »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Mie resonator"

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Lubatsch, Andreas, et Regine Frank. « Quantum Many-Body Theory for Exciton-Polaritons in Semiconductor Mie Resonators in the Non-Equilibrium ». Applied Sciences 10, no 5 (6 mars 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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Lan, Jun, Yunpeng Liu, Tao Wang, Yifeng Li et Xiaozhou Liu. « Acoustic coding metamaterial based on non-uniform Mie resonators ». Applied Physics Letters 120, no 16 (18 avril 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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Koshelev, Kirill, Sergey Kruk, Elizaveta Melik-Gaykazyan, Jae-Hyuck Choi, Andrey Bogdanov, Hong-Gyu Park et Yuri Kivshar. « Subwavelength dielectric resonators for nonlinear nanophotonics ». Science 367, no 6475 (16 janvier 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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Yan, Jiahao, Churong Ma, Yingcong Huang et Guowei Yang. « Single silicon nanostripe gated suspended monolayer and bilayer WS2 to realize abnormal electro-optical modulation ». Materials Horizons 6, no 2 (2019) : 334–42. http://dx.doi.org/10.1039/c8mh01009a.

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Zeng, Lizhen, Yuting Yang et Gongli Xiao. « An All-Dielectric Color Filter, with a Wider Color Gamut ». Photonics 9, no 10 (21 septembre 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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Roy, Arijit Bardhan, Sonali Das, Avra Kundu, Chandan Banerjee et Nillohit Mukherjee. « c-Si/n-ZnO-based flexible solar cells with silica nanoparticles as a light trapping metamaterial ». Physical Chemistry Chemical Physics 19, no 20 (2017) : 12838–44. http://dx.doi.org/10.1039/c7cp01128h.

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Kang, Jiwon, Young Jin Yoo, Joo Hwan Ko, Abdullah Al Mahmud et Young Min Song. « Trilayered Gires–Tournois Resonator with Ultrasensitive Slow-Light Condition for Colorimetric Detection of Bioparticles ». Nanomaterials 13, no 2 (12 janvier 2023) : 319. http://dx.doi.org/10.3390/nano13020319.

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Over the past few decades, advances in various nanophotonic structures to enhance light–matter interactions have opened numerous opportunities for biosensing applications. Beyond the successful development of label-free nanophotonic biosensors that utilize plasmon resonances in metals and Mie resonances in dielectrics, simpler structures are required to achieve improved sensor performance and multifunctionality, while enabling cost-effective fabrication. Here, we present a simple and effectual approach to colorimetric biosensing utilizing a trilayered Gires–Tournois (GT) resonator, which provides a sensitive slow-light effect in response to low refractive index (RI) substances and thus enables to distinguish low RI bioparticles from the background with spatially distinct color differences. For low RI sensitivity, by impedance matching based on the transmission line model, trilayer configuration enables the derivation of optimal designs to achieve the unity absorption condition in a low RI medium, which is difficult to obtain with the conventional GT configuration. Compared to conventional bilayered GT resonators, the trilayered GT resonator shows significant sensing performance with linear sensitivity in various situations with low RI substances. For extended applications, several proposed designs of trilayered GT resonators are presented in various material combinations by impedance matching using equivalent transmission line models. Further, comparing the color change of different substrates with low RI NPs using finite-difference time-domain (FDTD) simulations, the proposed GT structure shows surpassing colorimetric detection.
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Lewi, Tomer, Nikita A. Butakov et Jon A. Schuller. « Thermal tuning capabilities of semiconductor metasurface resonators ». Nanophotonics 8, no 2 (28 novembre 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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Wood, Thomas, Meher Naffouti, Johann Berthelot, Thomas David, Jean-Benoît Claude, Léo Métayer, Anne Delobbe et al. « All-Dielectric Color Filters Using SiGe-Based Mie Resonator Arrays ». ACS Photonics 4, no 4 (27 mars 2017) : 873–83. http://dx.doi.org/10.1021/acsphotonics.6b00944.

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Jacobsen, Rasmus E., Andrei V. Lavrinenko et Samel Arslanagić. « Reconfigurable dielectric resonators with imbedded impedance surfaces—From enhanced and directional to suppressed scattering ». Applied Physics Letters 122, no 8 (20 février 2023) : 081701. http://dx.doi.org/10.1063/5.0139695.

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Resonant elements play a vital role in tailoring of the radiation and scattering properties of devices, such as antennas and functional material platforms. We presently demonstrate a simple resonator that supports a multitude of scattering states. The resonator is a hybrid structure consisting of a finite-height dielectric cylinder integrated with a concentric impedance surface. Given its simple configuration, we apply the classical Lorentz–Mie theory to analyze its scattering properties analytically. Through a careful tuning of its geometry, the resonator is found to support enhanced and directive scattering states as well as the suppressed scattering states also known as anapole states. A prototype of the resonator has been built and tested at microwave frequencies. It utilizes water as the dielectric and a metallic tube with periodic slits as the impedance surface. Exploiting the flexibility of water, the design is easily reconfigured for different scattering responses: fully filled, the resonator is found to scatter predominantly in the forward direction, whereas an anapole state emerges with significant reduction of scattering when the resonator is partially filled with water. Consequently, the proposed resonator may be of great interest within the broad area of antenna design and functional material platforms, encompassing not only the obvious microwave frequencies but also the THz- and optical domain using high-permittivity dielectrics and graphene/nano-particle surfaces.
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Thèses sur le sujet "Mie resonator"

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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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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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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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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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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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Livres sur le sujet "Mie resonator"

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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 et IEEE-Russia Conference on High Power Microwave Electronics (2nd : 1999 : Novosibirsk, Russia), dir. 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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Doody, Colleen. Labor and the Birth of the Postwar Red Scare, 1945–1950. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252037276.003.0003.

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This chapter demonstrates how local politics in Detroit was roiled by a debate over the power of labor and the expansion of the New Deal state. Labor's size and influence grew rapidly during the New Deal and the war. Despite the fact that Detroit was the most heavily unionized city in the nation, anti-CIO candidates won political office in some crucial elections by linking labor to the Communist Party. While such red baiting was fairly conventional behavior, this language resonated with voters during the mid-1940s who feared labor's strength and chafed against wartime government regulations. In response to their defeats, labor leaders battled to determine the role labor would play in the postwar world while also debating the role Communists and their supporters would play in labor's ranks.
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Coleman, Deirdre. Imperial Commerce, Gender, and Slavery. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199574803.003.0024.

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This chapter explores the twinned emergence in the British novel of a critique of plantation slavery and commercial imperialism with a proto-feminist questioning of the ‘commerce of the sexes’. The discourses of racial and sexual oppression resonate with one another, helping to establish connections between inequalities at home and the sufferings of distant others. It has been argued that novelistic representations of violence and suffering are central to an ‘imagined empathy’ which in turn assisted the development in the eighteenth century of humanitarian sentiment. While it might be charged that the mid-eighteenth-century novel failed to grant full humanity to the enslaved and that it was somewhat instrumentalist in its handling of slavery reform, it can be demonstrated that the versatility of the figure of slavery enabled fuller characterization of the colonized and enslaved, as well as the more explicit imagining of colonial violence.
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Freedman, Linda. William Blake and the Myth of America. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198813279.001.0001.

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This book tells the story of William Blake’s literary reception in America and suggests that ideas about Blake’s poetry and personality helped shape mythopoeic visions of America from the abolitionists to the counterculture. It links high and low culture and covers poetry, music, theology, and the novel. American writers have turned to Blake in times of cataclysmic change, terror, and hope to rediscover the symbolic meaning of their country. Blake entered American society when slavery was rife and civil war threatened the fragile experiment of democracy. He found his moment in the mid-twentieth-century counterculture as left-wing Americans took refuge in the arts at a time of increasingly reactionary conservatism, vicious racism, pervasive sexism, dangerous nuclear competition, and an increasingly unpopular war in Vietnam, the fires of Orc raging against the systems of Urizen. Blake’s America, as a symbol of cyclical hope and despair, influenced many Americans who saw themselves as continuing the task of prophecy and vision. Blakean forms of bardic song, aphorism, prophecy, and lament became particularly relevant to a literary tradition which centralized the relationship between aspiration and experience. His interrogations of power and privilege, freedom and form resonated with Americans who repeatedly wrestled with the deep ironies of new world symbolism and sought to renew a Whitmanesque ideal of democracy through affection and openness towards alterity.
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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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Chapitres de livres sur le sujet "Mie resonator"

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Satheesh Kumar, P., P. Chitra et S. Sneha. « Design of Improved Quadruple-Mode Bandpass Filter Using Cavity Resonator for 5G Mid-Band Applications ». Dans 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 ». Dans Google Me, traduit par 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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Mergenthal, Rebekah M. K. « “Odious” Abolitionists and “Insolent” Runaways ». Dans Borderland Narratives. University Press of Florida, 2017. http://dx.doi.org/10.5744/florida/9780813054957.003.0006.

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In the 1840s and 1850s, local slaveholders, runaway slaves, and Shawnees and their missionaries attached different meanings to the border between the territory of the Shawnees and the state of Missouri, between Indian Country and the United States. The inhabitants’s complicated and contradictory understandings of this borderland helped construct their identities, and the meanings they ascribed to the border resonated beyond their specific locality. A closer focus on this thirty-mile-long border exposes its meaning for people on each side and for those who crossed it. The line also had broader significance because national politicians intended it to differentiate U.S. and Indian territories. The border separated the Shawnee and Missouri settlers, and politicians believed it would prevent interactions in the area. However, other border residents had their own ideas and did what they could to make the boundary more permeable. The line mattered, but it resonated in unexpected and telling ways because of what people tried to do with and along it.
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Ball, Blake Scott. « The Future Frightens Me ». Dans Charlie Brown's America, 26–40. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780190090463.003.0003.

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Peanuts in the 1950s could be a strange, quirky, existentialist journey. Equal parts bleak and absurd, Charles Schulz’s humor resonated with mid-century Americans plagued by feelings of alienation, anxiety, and dislocation. Peanuts was in many ways a Cold War story. Nuclear explosions and fallout, cowboy and Indian battles, and spacemen played a prominent role in the children’s play. Linus’s security blanket and Lucy’s psychiatry booth became powerful metaphors for the therapeutic revolution in American culture and were regularly used in psychiatry textbooks of the period. Schulz’s work became increasingly popular among college-aged existentialists and beatniks. In 1955, Schulz’s rapid rise in popularity led to a national Cartoonist of the Year award.
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Ewing, Adam. « Afterword ». Dans The Age of Garvey. Princeton University Press, 2014. http://dx.doi.org/10.23943/princeton/9780691157795.003.0010.

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This concluding chapter reflects on the success of Garveyism in both the United States, Africa, and the Caribbean. It considers how the Universal Negro Improvement Association (UNIA) had offered a powerful ideological and political vehicle for African activists during the dark years of interwar European rule, and how the impact of Garveyism continues to be felt in the continent. In the United States, as in Africa, the efforts of American Garveyites to construct vibrant organizational containers during an inauspicious decade resonated through the years. Finally, in the Caribbean, the return of labor radicalism in the mid-1930s both eclipsed established modes of Garveyist political association and boasted a leadership that had been nurtured within the Garvey movement.
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Hecker, Sharon. « Internationalism and Experimentation ». Dans 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 ». Dans Cultural Sustainabilities, sous la direction de 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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Kilcline, Cathal. « Introduction ». Dans 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 ». Dans 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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Hattaway, Doug, et Eric Zimmermann. « Winning Words and Strategic Stories ». Dans Talking Health, C3–50. Oxford University PressNew York, 2022. http://dx.doi.org/10.1093/oso/9780197528464.003.0004.

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Abstract This chapter emphasizes the importance of the words that are used in communication and how audiences of strategic public health messaging perceive language. The chapter examines the role of “winning” words and the role of storytelling as two principal aspects of successful public health messaging. Strategic storytelling is another important component of relaying public health messaging. This includes describing public health professionals and public health initiatives in terms that will resonate with the audience. The language used and the stories told are just as important as the data public health professionals mine and the studies they publish. A core aim of effective public health storytelling is to align the messaging of public health initiatives with the personal visions of health that each person has for their own life. Making the connection between personal and public health is key.
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Actes de conférences sur le sujet "Mie resonator"

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Yang, Zhuohui, Zengkai Shao, Yanfeng Zhang, Bingzhi Zhang, Yujie Chen et Siyuan Yu. « Asymmetric backscattering of a SiNx microring resonator with a Mie scatterer ». Dans Asia Communications and Photonics Conference. Washington, D.C. : OSA, 2017. http://dx.doi.org/10.1364/acpc.2017.m3e.4.

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Fang, Jie, Kan Yao et Yuebing Zheng. « Achieving Near-Intrinsic Exciton Linewidth at Room Temperature in Monolayer WS2 Coupled with a Mie Resonator ». Dans CLEO : Applications and Technology. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.jth6c.5.

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Strong multiparticle interactions at room temperature (RT) lead to broadened homogeneous exciton linewidths in 2D semiconductors, degrading the quality of excitonic mode and emission. By coupling a Mie resonator with monolayer WS2, we achieve narrowed linewidths at RT, approaching the theoretical limit at 0 Kelvin.
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Pashaei Adl, Hamid, Setatira Gorji, Isaac Suárez, Vladimir S. Chirvony, Andrés F. Gualdrón-Reyes, Iván Mora-Seró et Juan P. Martínez-Pastor. « Manipulating spontaneous emission of the CsPbI3 Perovskite NCs using hybrid (HMM-Mie resonator) structures ». Dans Applied Light-Matter Interactions in Perovskite Semiconductors 2021. València : Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.almips.2021.022.

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Singh, Danveer. « Subwavelength mie-resonant selenium resonators for mid-infrared meta-optics ». Dans Metamaterials, Metadevices, and Metasystems 2021, sous la direction de Nader Engheta, Mikhail A. Noginov et Nikolay I. Zheludev. SPIE, 2021. http://dx.doi.org/10.1117/12.2597756.

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Zalogina, Anastasia, Pavel Tonkaev, Aditya Tripathi, Hoo-Cheol Lee, Luca Carletti, Hong-Gyu Park, Sergey Kruk et Yuri Kivshar. « Observation of Giant Five-Photon Upconversion Luminescence in Subwavelength AlGaAs Resonators ». Dans 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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Gottardo, S., R. Sapienza, P. D. García, J. Bertolotti, A. Blanco, C. Lopez et D. S. Wiersma. « Random Laser Action from Mie Resonators ». Dans Photonic Metamaterials : From Random to Periodic. Washington, D.C. : OSA, 2007. http://dx.doi.org/10.1364/meta.2007.thc3.

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Yang, Chi, Matthew Suttinger, Alan H. Paxton, Chunte A. Lu et Ron Kaspi. « Mid-IR broad area angled cavity diode lasers ». Dans Laser Resonators, Microresonators, and Beam Control XXIV, sous la direction de Andrea M. Armani, Alexis V. Kudryashov, Alan H. Paxton, Vladimir S. Ilchenko et Julia V. Sheldakova. SPIE, 2022. http://dx.doi.org/10.1117/12.2614806.

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Boudarham, Guillaume, Brice Roily, Redha Abdeddaim, Jean-Michel Geffrin, Brian Stout, Sebastien Bidault et Nicolas Bonod. « Manipulating light matter interaction with Mie resonators ». Dans 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 et Alberto G. Curto. « Nanophotonic chirality transfer to dielectric Mie resonators ». Dans 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 et Alberto G. Curto. « Nanophotonic chirality transfer to dielectric Mie resonators ». Dans Metamaterials XIII, sous la direction de Kevin F. MacDonald, Anatoly V. Zayats et Isabelle Staude. SPIE, 2022. http://dx.doi.org/10.1117/12.2621211.

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