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Готові списки джерел за темами / Dynamical tunability

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Добірка наукової літератури з теми "Dynamical tunability"

Автор: Grafiati

Опубліковано: 21 листопада 2023

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Статті в журналах з теми "Dynamical tunability"

1

Sciortino, Alice, Michela Gazzetto, Gianpiero Buscarino, Radian Popescu, Reinhard Schneider, Gaetano Giammona, Dagmar Gerthsen, et al. "Disentangling size effects and spectral inhomogeneity in carbon nanodots by ultrafast dynamical hole-burning." Nanoscale 10, no. 32 (2018): 15317–23. http://dx.doi.org/10.1039/c8nr02953a.

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2

Wang, Zhao, and Li. "Dynamical Manipulation of Surface Plasmon Polaritons." Applied Sciences 9, no. 16 (August 11, 2019): 3297. http://dx.doi.org/10.3390/app9163297.

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As the fundamental and promising branch of nanophotonics, surface plasmon polaritons (SPP) with the ability of manipulating the electromagnetic field on the subwavelength scale are of interest to a wide spectrum of scientists. Composed of metallic or dielectric structures whose shape and position are carefully engineered on the metal surface, traditional SPP devices are generally static and lack tunability. Dynamical manipulation of SPP is meaningful in both fundamental research and practical applications. In this article, the achievements in dynamical SPP excitation, SPP focusing, SPP vortex, and SPP nondiffracting beams are presented. The mechanisms of dynamical SPP devices are revealed and compared, and future perspectives are discussed.

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3

Shcherbinin, S. A., S. V. Ustiuzhanina та A. A. Kistanov. "Dynamical stability and electronic structure of β-phosphorus carbide nanowires". Journal of Micromechanics and Molecular Physics 05, № 03 (вересень 2020): 2050007. http://dx.doi.org/10.1142/s2424913020500071.

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In this work, [Formula: see text]-phosphorus carbide 1D nanowires (PCNWs) are investigated in the framework of density functional theory. The dynamical stability of the considered [Formula: see text]-PCNWs at 300[Formula: see text]K is verified using ab initio molecular dynamics calculations. According to the results on the band structure calculations, [Formula: see text]-PCNWs can be semiconductors, semimetals or metals depending on their size and form. Thus, owning to their unique shape and high tunability of electronic properties, [Formula: see text]-PCNWs may be used in optical and photovoltaic nanodevices.

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4

Huang, G. Q., and Z. W. Xing. "Band-gap tunability and dynamical instability in strained monolayer and bilayer phosphorenes." Journal of Physics: Condensed Matter 27, no. 17 (April 2, 2015): 175006. http://dx.doi.org/10.1088/0953-8984/27/17/175006.

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5

Bruno, Vincenzo, Stefano Vezzoli, Clayton DeVault, Thomas Roger, Marcello Ferrera, Alexandra Boltasseva, Vladimir M. Shalaev, and Daniele Faccio. "Dynamical Control of Broadband Coherent Absorption in ENZ Films." Micromachines 11, no. 1 (January 20, 2020): 110. http://dx.doi.org/10.3390/mi11010110.

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Interferometric effects between two counter-propagating beams incident on an optical system can lead to a coherent modulation of the absorption of the total electromagnetic radiation with 100% efficiency even in deeply subwavelength structures. Coherent perfect absorption (CPA) rises from a resonant solution of the scattering matrix and often requires engineered optical properties. For instance, thin film CPA benefits from complex nanostructures with suitable resonance, albeit at a loss of operational bandwidth. In this work, we theoretically and experimentally demonstrate a broadband CPA based on light-with-light modulation in epsilon-near-zero (ENZ) subwavelength films. We show that unpatterned ENZ films with different thicknesses exhibit broadband CPA with a near-unity maximum value located at the ENZ wavelength. By using Kerr optical nonlinearities, we dynamically tune the visibility and peak wavelength of the total energy modulation. Our results based on homogeneous thick ENZ media open a route towards on-chip devices that require efficient light absorption and dynamical tunability.

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6

Basu, Pradosh, Barun Halder, Sriganapathy Raghav, and Utpal Roy. "Nonlinear Excitations in Ultracold Atoms Trapped in Triple Optical Lattices." Condensed Matter 7, no. 3 (September 9, 2022): 52. http://dx.doi.org/10.3390/condmat7030052.

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Various solitary wave excitations are found for a Bose-Einstein condensate in presence of two hybrid potentials in the form of triple mixtures of optical lattices. One of these potentials comprises of a combination of two important lattice profiles, such as frustrated optical lattice and double-well super-lattice, within one. Another represents a composite lattice combination, resulting in a wider and deeper frustrated optical lattice. The dynamical equation for such a system is solved by the exact analytical method to obtain a bright solitary wave, periodic wave and cnoidal wave excitations. We also report Anderson localization, bifurcation of condensate at the center and a competition between two different types of localizations upon trap engineering. Dynamical and structural stability analyses are also carried out, which reveal the obtained solutions as extremely stable for structural noise incorporation and sufficiently stable for dynamical stability. These triple mixtures of optical lattices impart better tunability on the condensate profile, which has made this system a true quantum simulator.

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Sciortino, Cannas, and Messina. "Temperature-Dependence of Solvent-Induced Stokes Shift and Fluorescence Tunability in Carbon Nanodots." C 5, no. 2 (April 24, 2019): 20. http://dx.doi.org/10.3390/c5020020.

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We carried out a cryogenic investigation on the optical properties of carbon dots, aiming to better understand their emission mechanism and the role of the solvent. The solvatochromic Stokes shift is quantified by a low temperature approach which allows freezing of the photo-excited state of carbon dots, preventing any solvation relaxation. Moreover, the reduction in temperature helps to identify the dynamical inhomogeneous contribution to the broadening of the emission band; therefore, disentangling the role of solvent from other types of broadening, such as the homogeneous and the static inhomogeneous contributions.

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Debashis, Punyashloka, Aman K. Maskay, Pramey Upadhyaya, and Zhihong Chen. "Spin–orbit torque controlled stochastic oscillators with synchronization and frequency tunability." Journal of Applied Physics 131, no. 12 (March 28, 2022): 123901. http://dx.doi.org/10.1063/5.0077237.

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Stochastic oscillators based on emerging nanodevices are attractive because of their ultra-low power requirement and the ability to exhibit stochastic resonance, a phenomenon where synchronization to weak input signals is enabled due to ambient noise. In this work, a low barrier nanomagnet-based stochastic oscillator is demonstrated, whose output jumps spontaneously between two states by harnessing the ambient thermal noise, requiring no additional power. By utilizing spin–orbit torque in a three-terminal device configuration, phase synchronization of these oscillators to weak periodic drives of particular frequencies is demonstrated. Experiments are performed to show the tunability of this synchronization frequency by controlling an electrical feedback parameter. The current required for synchronization is more than eight times smaller than that required for the deterministic switching of similar nanomagnetic devices. A model based on Kramers’ transition rate in a symmetric double well potential is adopted and dynamical simulations are performed to explain the experimental results.

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9

Genix, Anne-Caroline, Vera Bocharova, Bobby Carroll, Philippe Dieudonné-George, Edouard Chauveau, Alexei P. Sokolov, and Julian Oberdisse. "Influence of the Graft Length on Nanocomposite Structure and Interfacial Dynamics." Nanomaterials 13, no. 4 (February 16, 2023): 748. http://dx.doi.org/10.3390/nano13040748.

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Both the dispersion state of nanoparticles (NPs) within polymer nanocomposites (PNCs) and the dynamical state of the polymer altered by the presence of the NP/polymer interfaces have a strong impact on the macroscopic properties of PNCs. In particular, mechanical properties are strongly affected by percolation of hard phases, which may be NP networks, dynamically modified polymer regions, or combinations of both. In this article, the impact on dispersion and dynamics of surface modification of the NPs by short monomethoxysilanes with eight carbons in the alkyl part (C8) is studied. As a function of grafting density and particle content, polymer dynamics is followed by broadband dielectric spectroscopy and analyzed by an interfacial layer model, whereas the particle dispersion is investigated by small-angle X-ray scattering and analyzed by reverse Monte Carlo simulations. NP dispersions are found to be destabilized only at the highest grafting. The interfacial layer formalism allows the clear identification of the volume fraction of interfacial polymer, with its characteristic time. The strongest dynamical slow-down in the polymer is found for unmodified NPs, while grafting weakens this effect progressively. The combination of all three techniques enables a unique measurement of the true thickness of the interfacial layer, which is ca. 5 nm. Finally, the comparison between longer (C18) and shorter (C8) grafts provides unprecedented insight into the efficacy and tunability of surface modification. It is shown that C8-grafting allows for a more progressive tuning, which goes beyond a pure mass effect.

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10

Feng, Chun, Meiyin Yang, Kui Gong, Xujing Li, Baohe Li, Yong Jiang, and Guanghua Yu. "Dynamical mechanism for coercivity tunability in the electrically controlled FePt perpendicular films with small grain size." Journal of Applied Physics 115, no. 2 (January 14, 2014): 023906. http://dx.doi.org/10.1063/1.4861738.

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Більше джерел

Дисертації з теми "Dynamical tunability"

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Röder, Robert [Verfasser], Carsten Gutachter] Ronning, Martin [Gutachter] Eickhoff, and i. Morral Anna [Gutachter] [Fontcuberta. "Semiconductor nanowire based coherent light sources : temporal dynamics and tunability / Robert Röder ; Gutachter: Carsten Ronning, Martin Eickhoff, Anna Fontcuberta i Morral." Jena : Friedrich-Schiller-Universität Jena, 2017. http://d-nb.info/1177603284/34.

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Lhuillier, Jérémy. "Accordabilité des composants photoniques à base de structures hybrides graphène/diélectrique adressables par la surface." Electronic Thesis or Diss., Lyon, 2022. https://bibli.ec-lyon.fr/exl-doc/TH_2022LYSEC008.pdf.

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L’émergence d’une grande variété de structures photoniques, au cours des dernières décennies, a permis le développement de composants intégrés sur puce réalisant des fonctions optiques en espace libre de plus en plus complexes. Parmi elles, les structures diélectriques membranaires ont permis d’implémenter une large panoplie de composants optiques planaires, allant du filtrage spectral résonant à la mise en forme de faisceau avec de faibles pertes. Toutefois, si ces structures permettent d’obtenir un contrôle quasi-total du champ électromagnétique rayonné, ce contrôle est généralement statique et déterminé par la fabrication. Un nombre croissant d’applications – telles que les télécommunications en espace libre, les capteurs pour systèmes autonomes ou encore l’imagerie – nécessitent pourtant des composants photoniques agiles, motivant ainsi la recherche de moyens de contrôle actifs de la réponse optique à implémenter au sein des structures diélectriques. À cette fin, différentes propriétés du graphène s’avèrent prometteuses. En particulier, la possibilité de moduler dynamiquement son absorption ouvre de nombreuses perspectives pour le contrôle électrique et optique des structures photoniques intégrant du graphène. Des modulateurs électro-optiques et tout-optique ont ainsi pu être réalisés, s’appuyant sur le développement récent de procédés de transfert des matériaux 2D qui permettent aujourd’hui d’obtenir des structures hybrides graphène/diélectrique de grande qualité. Dans ce contexte, les travaux présentés dans cette thèse cherchent à exploiter l’absorption modulable du graphène pour obtenir une accordabilité dynamique de la réponse optique des composants adressables par la surface, dans le cas particulier de structures photoniques diélectriques travaillant dans le proche infrarouge. Un modèle générique de composant hybride diélectrique/ graphène est tout d’abord développé en théorie des modes couplés afin d’identifier les paramètres d’intérêt pour maximiser le contrôle permis par l’absorption du graphène. Dans le cas à une résonance, le comportement du système est principalement déterminé par la condition de couplage critique classiquement définie pour l’étude de l’absorption du graphène. Dans le cas à deux résonances en revanche, un nouveau paramètre de contrôle – associé à la différence d’absorption induite sur les résonances – permet d’obtenir un levier d’accordabilité supplémentaire. Différentes stratégies de maximisation de ce paramètre sont proposées et les procédés technologiques nécessaires à leur implémentation sont étudiés expérimentalement afin d’évaluer – par le biais de la spectroscopie Raman et de la spectroscopie de photoélectrons – leur effet sur la qualité structurelle et chimique du graphène, intégré dans de telles structures. La modulation spatiale de l’absorption du graphène – proposée pour différencier l’absorption induite sur différents modes optiques – est ensuite étudiée expérimentalement à l’aide de structures exploitant le transfert de charges entre le graphène et un oxyde à grand travail de sortie, à savoir l’oxyde de tungstène. Les dispositifs réalisés permettent d’obtenir une modulation du potentiel chimique du graphène de 0.1eV – caractérisée par nano-XPS (ligne ANTARES du synchrotron SOLEIL) et spectroscopie Raman – pouvant aboutir à une modulation de l’absorption supérieure à 70% pour certaines longueurs d’onde. Finalement, une architecture de composant hybride actif permettant d’obtenir un contrôle dynamique de l’émission laser est proposée. Cette architecture repose sur l’utilisation d’une membrane à brisure de symétrie verticale et permet, en principe, d’obtenir une commutation entre deux angles d’émission par la modulation de l’absorption du graphène. L’intérêt de ces structures pour parvenir à une accordabilité continue de l’angle d’émission est également exposé
The emergence of a wide variety of photonic structures over the past decades has enabled the realization of on-chip devices performing increasingly complex free-space optical functions. Among them, dielectric membrane structures have made it possible to implement a wide range of planar optical devices, ranging from resonant spectral filtering to beam shaping, with negligible losses. While these structures provide almost a full control of the radiated electromagnetic field, this control is usually static and determined by manufacturing. An increasing number of applications - such as free-space telecommunications, sensors for autonomous systems or imaging - require agile photonic devices, thus motivating the search for means of active control of the optical response to be implemented within the dielectric structures. To this purpose, various properties of graphene are proving promising. In particular, the capability to modulate its absorption opens up numerous prospects for the electrical and optical control of photonic structures that integrate graphene. This has led to the demonstration of various electro-optic and all-optical modulators, by leveraging the recently developed 2D material transfer processes, which have made it possible to obtain high-quality hybrid graphene/dielectric structures. In this context, the work presented in this thesis seeks to exploit graphene’s tunable absorption to achieve dynamic control of surface-addressable device’s optical response, in the special case of dielectric photonic structures operating in the near infrared. A generic coupled mode theory model is first developed and adapted to hybrid dielectric/ graphene structures in order to identify the key parameters for maximising the control allowed by graphene absorption. In the single resonance case, the system’s response is mainly determined by the critical coupling condition classically defined for the study of graphene’s absorption. In the two-resonance case however, a new control parameter – associated with the absorption difference between the resonances – provides an additional tunability factor. Different strategies for maximising this parameter are therefore proposed and the technological processes underlying their implementation are studied experimentally in order to assess - by means of Raman spectroscopy and photoelectron spectroscopy - their effect on the structural and chemical quality of graphene. The spatial modulation of graphene’s absorption – here proposed to differentiate the absorption induced on different optical modes – is then studied experimentally using structures exploiting the charge transfer effect at the interface between graphene and an oxide with high workfunction, namely tungsten oxide. The devices developed here allow to obtain a graphene’s chemical potential modulation of 0.1eV - characterized by nano-XPS (ANTARES beamline of the SOLEIL synchrotron) and Raman spectroscopy - which can lead to an absorption modulation higher than 70% for certain wavelengths. Ultimately, an active hybrid device architecture enabling dynamic control of the laser emission is proposed. This architecture is based on a vertical symmetry breaking membrane and allows us, in principle, to switch between two emission angles by modulating graphene’s absorption. The interest of these structures in achieving continuous tunability of the emission angle is also presented

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3

Rudau, Fabian Robert [Verfasser], and Reinhold [Akademischer Betreuer] Kleiner. "Terahertz radiation from intrinsic Josephson junctions in Bi 2 Sr 2 Ca Cu 2 O 8+delta - dynamics, tunability, and applications / Fabian Robert Rudau ; Betreuer: Reinhold Kleiner." Tübingen : Universitätsbibliothek Tübingen, 2018. http://d-nb.info/1168238390/34.

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4

Hajjaj, Amal. "Electrothermally Tuned and Electrostatically Actuated MEMS Resonators: Dynamics and Applications." Diss., 2019. http://hdl.handle.net/10754/652869.

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The objective of this thesis is to present a theoretical and experimental investigation of the dynamics of micro and nano-electromechanical systems electrothermally tuned and electrostatically actuated, and explore their potential for practical applications. The first part of the dissertation presents the tuning of the frequency of clamped-clamped micro and nano-resonators, straight and curved. These resonators are electrothermally or electrostatically tuned. The effect of geometric parameters on the frequency variation is investigated experimentally and theoretically using a reduced order model based on the Euler-Bernoulli beam theory. High tunability is demonstrated for micro and nano beams, straight and initially curved. The second part discusses the dynamical behavior of a curved (arch) beam electrothermally tuned and electrostatically actuated. We show that the first resonance frequency increases up to twice its fundamental value and the third resonance frequency decreases until getting very close to the first resonance frequency triggering the veering phenomenon. We study experimentally and analytic ally, using the Galerkin procedure, the dynamic behavior of the arch beam. Next, upon changing the electrothermal voltage, the second symmetric natural frequency of the arch is adjusted to near twice, three times, and four times the fundamental natural frequency. This gives rise to a potential two-to-one, three-to-one, and four-to-one autoparametric resonances between the two modes. These resonances are demonstrated experimentally and theoretically. The third part of the dissertation is concerned with the incorporation of the electrothermally tuned and electrostatically actuated microresonators into potential applications: filtering and sensing. First, we experimentally prove an exploitation of the nonlinear softening, hardening, and veering phenomena of an arch beam, to demonstrate a flat, wide, and tunable bandwidth and center frequency by controlling the electrothermal actuation voltage. Second, a pressure sensor based on the convective cooling of the air surrounding an electrothermally heated resonant bridge is demonstrated experimentally. The concept is demonstrated using both straight and arch microbeam resonators driven and sensed electrostatically. The change in the surrounding pressure is shown to be accurately tracked by monitoring the change in the resonance frequency of the structure.

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Книги з теми "Dynamical tunability"

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Weides, M. P. Barriers in Josephson Junctions: An Overview. Edited by A. V. Narlikar. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198738169.013.15.

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This article considers Josephson junction barriers, focusing on barriers made from insulators, metals, semiconductors, magnets, and nanowires. The main characteristic of Josephson junctions is the local reduction or even suppression of the critical current in the barrier. These barriers affect the static and dynamics properties of Josephson junctions, including coupling strength, ground state, phase damping, and tunability of the critical current. The article first provides an overview of the fundamental physics of Josephson junctions, with particular emphasis on the Josephson effect, before describing the properties of two coupled superconductors. It then discusses tunnel barriers, metallic barriers, semiconducting barriers, and magnetic barriers.

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Частини книг з теми "Dynamical tunability"

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Abedin, Ashraf, Md Saeedur Rahman, A. K. M. Kazi Aurnob, and Jhonattan Manosalvas Mora. "Efficient Design Paradigm for Harvesting Solar Energy: Dynamic Tunability of Heating/Cooling Mode Using Advanced Nanotechnology." In ACS Symposium Series, 233–61. Washington, DC: American Chemical Society, 2022. http://dx.doi.org/10.1021/bk-2022-1421.ch009.

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2

Bananej, Alireza, S. Morteza, S. M., Amir Hassanpour, and S. Amiri. "Dynamic All Optical Slow Light Tunability by Using Nonlinear One Dimensional Coupled Cavity Waveguides." In Photonic Crystals - Innovative Systems, Lasers and Waveguides. InTech, 2012. http://dx.doi.org/10.5772/32633.

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3

Yanamandra, Aditya, Soumya Eachempati, Vijaykrishnan Narayanan, and Mary Jane Irwin. "Reliability Aware Performance and Power Optimization in DVFS-Based On-Chip Networks." In Dynamic Reconfigurable Network-on-Chip Design, 277–92. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-61520-807-4.ch011.

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Recently, chip multi-processors (CMP) have emerged to fully utilize the increased transistor count within stringent power budgets. Transistor scaling has lead to more error-prone and defective components. Static and run-time induced variations in the circuit lead to reduced yield and reliability. Providing reliability at low overheads specifically in terms of power is a challenging task that requires innovative solutions for building future integrated chips. Static variations have been studied previously. In this proposal, we study the impact of run-time variations on reliability. On-chip interconnection network that forms the communication fabric in the CMP has a crucial role in determining the performance, power consumption and reliability of the system. We manage protecting the data in a network on chip from transient errors induced by voltage fluctuations. Variations in operating conditions result in a significant variation in the reliability of the system, motivating the need to provide tunable levels of data protection. For example, the use of Dynamic Voltage and Frequency Scaling (DVFS) technique used in most CMPs today results in voltage variation across the chip, giving rise to variable error rates across the chip. We investigated the design of a dynamically reconfigurable error protection scheme in a NoC to achieve a desired level of reliability. We protect data at the desired reliability while minimizing the power and performance overhead incurred. We obtain a maximum of 55% savings in the power expended for error protection in the network with our proposed reconfigurable ECC while maintaining constant reliability. Further, 35% reduction in the average message latency in the network is observed, making a case for providing tunability in error protection in the on-chip network fabric.

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4

M. Mansour, Mohamed, and Haruichi Kanaya. "Tunable Zeroth-Order Resonator Based on Ferroelectric Materials." In Multifunctional Ferroelectric Materials. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98475.

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Tunable microwave devices have the benefits of added functionality, smaller form factor, lower cost, and lightweight, and are in great demand for future communications and radar applications as they can extend the operation over a wide dynamic range. Current tunable technologies include several schemes such as ferrites, semiconductors, microelectromechanical systems (MEMS), and ferroelectric thin films. While each technology has its own pros and cons, ferroelectric thin film-based technology has proved itself as the potential candidate for tunable devices due to its simple processes, low power consumption, high power handling, small size, and fast tuning. A tunable Composite Right Left-Handed Zeroth Order Resonator (CRLH ZOR) is introduced in this chapter and it relies mainly on the latest advancement in the ferroelectric materials. It is common that for achieving optimum performance for the resonant structure, this involves the incorporation of an additional tuning by either mechanical means (i.e. with tuning screws) or other coupling mechanisms. The integration between electronic tuning and High-Temperature Superconducting (HTS) components yields a high system performance without degradation of efficiency. This leads not only low-loss microwave components that could be fine-tuned for maximum efficiency but will provide a tunable device over a broadband frequency spectrum as well. The dielectric properties of the ferroelectric thin film, and the thickness of the ferroelectric film, play a fundamental role in the frequency or phase tunability and the overall insertion loss of the circuit. The key advantages of using ferroelectric are the potential for significant size-reduction of the microwave components and systems and the cabibility for integration with microelectronic circuits due to the utilization of thin and thick ferroelectric film technology. In this chapter, ZOR is discussed and the conceptual operation is introduced. The ZOR is designed and simulated by the full-wave analysis software. The response is studied using electromagnetic characteristics with the applied electric field, ferroelectric thickness, and the operating temperature.

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Тези доповідей конференцій з теми "Dynamical tunability"

1

Asher, Sanford A. "The Potential Revolution of the Free Electron Laser for UV Resonance Raman Spectroscopy in Biological, Structural and Dynamical Studies." In Free-Electron Laser Applications in the Ultraviolet. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/fel.1988.fa1.

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Advances in laser light sources have been the major driving force for progress in the development and application of Raman spectroscopy. The advances have utilized both the increased tunability of the laser sources as well as their short pulse lengths and high peak powers to both increase the information content as well as give dynamical information. We will discuss the revolution in the understanding of molecular and biomolecular structure which will derive from the application of FEL laser sources. We can easily extrapolate the utility of these new sources from our recent extensive UV Raman measurements using state-of-the-art commercial laser sources and non-linear optical conver sion techniques.

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2

Deveaud, B., MA Dupertuis, T. Hessler, J. Pleumeekers, and PE Selbmann. "Ultrafast dynamics and modelling of Semiconductor Optical Amplifiers for WDM applications." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cthb1.

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We have developped a research program aimed at the study of the ultrafast dynamical properties of Semiconductor Optical Amplifiers (SOAs). This program is run in collaboration with the group of H. Melchior, and of H. Jaeckel in Zurich and the group of F. Devaux at Alcatel. Amongst the properties of these devices, we specifically study their possibilities in terms of switching and wavelength conversion. To this aim, we have developped a femtosecond setup which allows to probe the cross gain dynamics of the amplifiers. A cw beam is fed into the amplifier and is modified by a strong cross-polarized pump beam. The changes of the cw beam are then time resolved with 150 fs resolution in a non linear gate. Such a set-up corresponds to the configuration used for wavelength conversion, and has the great interest to provide at the same time the time resolution and the relative tunability of the two laser beams over a wide range.

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3

Zhang, Qiwei, Hongbin Fang, Jian Xu, and Suyi Li. "Data-Driven Modeling of a Pneumatic Yoshimura-Origami Structure With Tunable Dynamics." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-90225.

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Abstract Origami has been widely used in designing tunable metamaterial due to its folding-induced shape reconfigurability and changeable mechanical properties. However, there is still a lack in achieving tunability via active means, and the tunability still remains in a static domain. Thus, the aim of this research is to solve these two problems. By combining the six-layers Yoshimura-ori with the pneumatic bladder together, a pneumatic Yoshimura-ori (PYO) cell is obtained. Noting that the Yoshimura-ori is coupled with the pneumatic bladder, and the physical parameters of the PYO cell are hard to obtain. Hence, a data-driven method which composed of the forward subset selection and the weighted least square (WLS) is carried out to establish the dynamic model. The whole structure is represented as a nonlinear spring-damper element. Based on the dynamic experiment data, the terms of the model could be determined through the forward subset selection. Then, we could use the WLS to identify the corresponding coefficients. Through numerical simulations, the proposed model could exhibit the frequency spectrum characteristic of the prototype effectively. The results of this paper could provide useful guidelines for the development of intelligent origami structures/metamaterials with excellent tunability, and meanwhile, extend the current investigation level from tunable quasi-static to tunable dynamics.

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Mizuno, Ayana, and Atsushi Ono. "Dynamic tunability and polarization anisotropy of elastic plasmonic device." In Active Photonic Platforms XI, edited by Ganapathi S. Subramania and Stavroula Foteinopoulou. SPIE, 2019. http://dx.doi.org/10.1117/12.2528950.

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Eggleton, Benjamin. "Microstructured optical fibers: Enabling integrated tunability for dynamic photonic applications." In Frontiers in Optics. Washington, D.C.: OSA, 2003. http://dx.doi.org/10.1364/fio.2003.wx3.

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Kawabe, Yutaka, Masaya Miyazaki, and Kento Okoshi. "DNA-based lasers with wavelength tunability through azobenzene photoinduced dynamic gratings." In Emerging Imaging and Sensing Technologies for Security and Defence V; Advanced Manufacturing Technologies for Micro- and Nanosystems in Security and Defence III, edited by Maria Farsari, John G. Rarity, Francois Kajzar, Attila Szep, Richard C. Hollins, Gerald S. Buller, Robert A. Lamb, et al. SPIE, 2020. http://dx.doi.org/10.1117/12.2573565.

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Wei, Tingyi, Jeremy L. Reid, Ravi P. Gollapalli, Derrick Vickery, D. Brian Thompson, and Cameron K. Gren. "Dynamic Tunability of Sensitivity of Graphene based Surface Plasmon Resonance Sensor." In Optical Sensors. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/sensors.2021.stu4f.3.

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Ge, Peinan, Jingang Yi, Jianbo Li, and Hao Lin. "Model Predictive Control of an Electroporation Process." In ASME 2010 Dynamic Systems and Control Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/dscc2010-4243.

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Electroporation is an elegant means to deliver molecules into the cellular cytoplasm, while simultaneously maintaining cell viability and functionality. Despite extensive research, however, electroporation methods still fall short of the desired efficiency and reliability. We present a model predictive control (MPC) design for enabling highly efficient and reliable electroporation processes. Instead of using one single electrical pulse in current practice, we consider a controlled multi-pulse electroporation based on an MPC framework. The most attractive properties of using MPC design of multi-pulse electroporation are the fast computation of optimal control solutions and the real-time tunability of the electrical field density during the process. We demonstrate the controlled electroporation process through simulation examples.

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Madeleine, Tristan, Giampaolo D'Alessandro, Malgosia Kaczmarek, Vanessa Verrina, Luciano De sio, and Francesca Petronella. "Plasmonic resonances of hybrid dielectric-metal nanopatch antennas and dynamic tunability induced by thermotropic liquid crystals." In Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XX, edited by Yu-Jung Lu, Takuo Tanaka, and Din Ping Tsai. SPIE, 2022. http://dx.doi.org/10.1117/12.2633446.

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Blocher, David B., and Alan T. Zehnder. "Tunability and Sub- and Superharmonic Entrainment of Limit Cycles in CW Laser Driven MEMS." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71545.

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The nonlinear dynamics of nanoscale mechanical oscillators driven both inertially and by CW laser light are explored experimentally. The oscillators are singly and doubly-supported beams, 200 nm thick with lengths up to 40 microns. The optically thin beams, suspended over a Si substrate, form a Fabry-Pérot interferometer. The net effect is that the fractions of absorbed and reflected light are periodic functions of the gap. Thus, monitoring the reflected signal allows the motion to be measured. In addition, motion of the device through the interference field modulates the temperature and hence thermal stress of the oscillator. The thermal stress provides a thermo-mechanical drive to the beam, resulting in nonlinear feedback that can drive the beam into limit cycle oscillation. The laser power needed for the onset of limit cycles is studied as a function of beam geometry, and laser placement. The oscillators show both hardening and softening behaviors, sub- and superharmonic entrainment and wide frequency tunability.

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