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Littérature scientifique sur le sujet « Superlensing »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Superlensing"

Ghosh, Rajib, et Rajib Chakraborty. « Superlensing property of 2-D glass photonic crystal ». European Physical Journal Applied Physics 92, n^o 2 (30 octobre 2020) : 20501. http://dx.doi.org/10.1051/epjap/2020200237.

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A two dimensional square lattice photonic crystal (PhC) formed by placing glass matrix in air is proposed for subwavelength imaging around 840 nm. The superlensing behavior at relatively lower wavelength compared to other reported PhC superlens is obtained by this configuration. Other advantages of using glass is that they have lower optical absorption at this wavelength and is relatively cheap. By placing the proposed PhC arrangement between the object and the objective of a conventional optical microscope, superlensing effect can be realized. Moreover, any change in radius of glass rod during fabrication process can result in the shift of superlensing wavelength.

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Yan, Bing, Zengbo Wang, Alan L. Parker, Yu-kun Lai, P. John Thomas, Liyang Yue et James N. Monks. « Superlensing microscope objective lens ». Applied Optics 56, n^o 11 (7 avril 2017) : 3142. http://dx.doi.org/10.1364/ao.56.003142.

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Nguyen, Hoai-Minh. « Superlensing using complementary media ». Annales de l'Institut Henri Poincare (C) Non Linear Analysis 32, n^o 2 (mars 2015) : 471–84. http://dx.doi.org/10.1016/j.anihpc.2014.01.004.

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Fehrenbacher, Markus, Stephan Winnerl, Harald Schneider, Jonathan Döring, Susanne C. Kehr, Lukas M. Eng, Yongheng Huo et al. « Plasmonic Superlensing in Doped GaAs ». Nano Letters 15, n^o 2 (14 janvier 2015) : 1057–61. http://dx.doi.org/10.1021/nl503996q.

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Lv, Jiangtao, Ming Zhou, Qiongchan Gu, Xiaoxiao Jiang, Yu Ying et Guangyuan Si. « Metamaterial Lensing Devices ». Molecules 24, n^o 13 (4 juillet 2019) : 2460. http://dx.doi.org/10.3390/molecules24132460.

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In recent years, the development of metamaterials and metasurfaces has drawn great attention, enabling many important practical applications. Focusing and lensing components are of extreme importance because of their significant potential practical applications in biological imaging, display, and nanolithography fabrication. Metafocusing devices using ultrathin structures (also known as metasurfaces) with superlensing performance are key building blocks for developing integrated optical components with ultrasmall dimensions. In this article, we review the metamaterial superlensing devices working in transmission mode from the perfect lens to two-dimensional metasurfaces and present their working principles. Then we summarize important practical applications of metasurfaces, such as plasmonic lithography, holography, and imaging. Different typical designs and their focusing performance are also discussed in detail.

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Luan, Pi-Gang. « Superlensing effect without obvious negative refraction ». Journal of Nanophotonics 1, n^o 1 (1 juillet 2007) : 013518. http://dx.doi.org/10.1117/1.2768384.

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Zapata-Rodríguez, Carlos J., David Pastor, María T. Caballero et Juan J. Miret. « Diffraction-managed superlensing using plasmonic lattices ». Optics Communications 285, n^o 16 (juillet 2012) : 3358–62. http://dx.doi.org/10.1016/j.optcom.2012.04.011.

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Christou, George, et Christos Mias. « Critique of Optical Negative Refraction Superlensing ». Plasmonics 6, n^o 2 (3 février 2011) : 307–9. http://dx.doi.org/10.1007/s11468-011-9205-8.

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Zhang, Haifei, Linfang Shen, Lixin Ran, Yu Yuan et Jin Au Kong. « Layered superlensing in two-dimensional photonic crystals ». Optics Express 14, n^o 23 (2006) : 11178. http://dx.doi.org/10.1364/oe.14.011178.

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Bonnetier, Eric, et Hoai-Minh Nguyen. « Superlensing using hyperbolic metamaterials : the scalar case ». Journal de l’École polytechnique — Mathématiques 4 (2017) : 973–1003. http://dx.doi.org/10.5802/jep.61.

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Plus de sources

Thèses sur le sujet "Superlensing"

Farhat, Mohamed. « Metamaterials for harmonic and biharmonic cloaking and superlensing ». Aix-Marseille 3, 2009. http://www.theses.fr/2009AIX30055.

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Dans le premier volet de cette thèse, on s'intéresse d'abord à la réfraction négative par des cristaux phononiques qui consistent en des tiges carrées qui se touchent presque. Ceci nous permet d'estimer analytiquement les courbes de dispersion en utilisant l'analyse asymptotique. Ensuite, on propose une structure réaliste pour une cape d'invisibilité pour les vagues. Ce métamatériau permet de guider les ondes de surface rayonnes par une source acoustique autour de la structure à rendre invisible. Des preuves numériques et expérimentales de ce mécanisme sont fournies dans ce document. Dans le second volet, on analyse les bases théoriques du cloaking élastique des ondes de flexion dans des plaques minces. On montre en particulier l'invariance des équations gouvernant la dynamique de ce type d'ondes sous des transformations géométriques. Enfin, on propose une structure en oignon (empilement de différentes couches concentriques isotropes où on fait varier le module d'Young et la densité) qui fonctionne sur une large gamme de fréquences
In the first part, we start by investigating lensing effects for doubly periodic phononic crystals (PC) made of close-to-touching square rods. We can hence approximate this system by one-dimensional vibrating strings in order to obtain analytically the dispersion curves of the structure. We give then the first practical realization of a cylindrical cloak for linear surface liquid waves. This structured metamaterial bends surface waves radiated by a closely located acoustic source over a finite interval of Hertz frequencies (as demonstrated by numerical simulations and experimental results). In the second part, we give the theoretical basis of cloaking for bending waves governed by the biharmonic equation. In particular we show how this fourth order equation transforms under geometrical transformations and we give the newly obtained equation inside the coat. We propose in addition a realistic model of the cloak by using a radially symmetric multi-layered coat. We finally provide a simplified design consisting of 10 layers using only 6 different materials overall which is proven to work in a large interval of frequencies

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MAINI, LUCA. « Metamaterials based on photonic quasicrystals : from superlensing to new photonic devices ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2010. http://hdl.handle.net/10281/18116.

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In this Ph.D thesis we verified that metamaterials based on photonic quasicrystals can have superlensing properties and that the same type of material, in a different configuration, is able to localize photons and thus suggests the possibility to build new photonic devices, namely optomechanical switches. We saw that a slab cut from a two dimensional 12-fold quasicrystalline tiling constitutes a metamaterial because of its effective refactive index that becomes negative in some frequency ranges. These regions of the spectrum where negative refraction and superlensing occurr can be found with the help of computational methods that calculate dispersion curves, equifrequency surfaces and electromagnetic field distribution of the system under study. In the particular case of quasicrystals, where the lack of translational symmetry forces to use big supercells, the amount of data and information contained in the dispersion curves and equifrequency surfaces is very dense and sometimes difficult to disentangle, suggesting particular care when predicting the behaviour of the physical system without the experimental counterpart. Examiming the electromagnetic field patterns of the quasicrystalline slab we found that several modes could be useful for cloaking, since they do not propagate in the whole structure but they are inhibited to go through certain regions, that remain hidden at particular frequencies. We think that other configurations of this kind of metamaterial give rise to interesting physical properties, more easily predictable, that can lead to the realization of new photonic devices. If we place two 12-fold quasicrystalline slabs together, separated by a vacuum layer of a precise thickness, we obtain the right conditions to localize photons between the two slabs. The localization takes place between two indentations of the slabs’ surfaces, that are a kind of intrinsic defects formed when the surface are created from the bigger quasicrystalline lattice. This type of defects is unique to quasicrystalline systems and originates from their lack of translational periodicity. The capability of localizing photons opens up the possibility of building devices exploiting this feature: for instance, we could realize a photonic switch with two states, one where the photon is localized and the other where the photon propagates, and as we discussed, the choice between these two states can be made only varying the distance between the two slabs. This double slab system seems to be exploitable for cloaking too, since we saw that point defects in the lattice, characterized by a different dielectric constant, do not affect the localization properties of the device.

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Culhaoglu, Ali Eren [Verfasser], Peter [Akademischer Betreuer] Russer, Wolfgang J. R. [Akademischer Betreuer] Hoefer et Hans-Joachim [Akademischer Betreuer] Bungartz. « Microwave Metamaterials : Superlensing and Design of Low Reflection Coatings / Ali Eren Culhaoglu. Gutachter : Peter Russer ; Wolfgang J. R. Hoefer ; Hans-Joachim Bungartz. Betreuer : Peter Russer ». München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1031512691/34.

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Culhaoglu, Ali Eren [Verfasser], Peter Akademischer Betreuer] Russer, Wolfgang J. R. [Akademischer Betreuer] Hoefer et Hans-Joachim [Akademischer Betreuer] [Bungartz. « Microwave Metamaterials : Superlensing and Design of Low Reflection Coatings / Ali Eren Culhaoglu. Gutachter : Peter Russer ; Wolfgang J. R. Hoefer ; Hans-Joachim Bungartz. Betreuer : Peter Russer ». München : Universitätsbibliothek der TU München, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20120724-1092907-0-5.

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Al, lethawe Mohammed abdulridha. « Band gaps and waveguiding of surface acoustic waves in pillars-based phononics crystals ». Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2057.

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[…] Dans ce travail de thèse, nous nous sommes intéressés à ces bandes interdites et à ces modes de propagations dans le cas d’un cristal photonique constitué d’une matrice de piliers déposés en surface d’un milieu semi-fini. L’étude des interactions entre les piliers résonants localement avec la surface du milieu semi fini nous a permis d’identifier de nouveaux modes de propagation […]Nous avons également montré comment obtenir une réfraction négative omnidirectionnelle[…] La dernière partie de ce travail a été consacré à l’étude des mécanismes permettant la propagation et le confinement d’ondes guidées[…] .Nous avons également explicité les mécanismes qui permettent de crée ce type d’ondes guidées sub-longeur d’onde et le confinement des photons de surface
[...] We present the features of the interaction between surface acoustic wave and locally resonant pillar on the top of demi infinite medium. We shown that the photonic crystal we proposed possess an acoustic metamaterial feature for surface acoustic waves in the manner that pillars on the top of the surface introduce new guide modes in the non radiative region of the substrate outside sound cone. We also demonstrate the these guided modes are resonant modes that have frequencies greatly lower than those expected from the Bragg mechanism. […]

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Costa, João Tiago de Figueiredo e. « Nonlocal effective medium approach to wave propagation in metamaterials ». Doctoral thesis, 2013. http://hdl.handle.net/10316/22053.

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Tese de doutoramento em Engenharia Electrotécnica e de Computadores, no ramo de especialização em Telecomunicações, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra
In the last couple of decades the scientific community has given a great attention to a striking class of modern artificial materials, the so-called metamaterials. This class of artificial materials is characterized by extraordinary and unusual electromagnetic properties, and it has naturally attracted researchers worldwide. It has been shown that these materials have exciting applications in the emerging fields of nanophotonics and plasmonics. The characterization of the electromagnetic behavior of metamaterials is therefore increasingly important. This thesis is devoted to the study of numerical methods based on effective medium theory to characterize the electromagnetic response of nonlocal metamaterials. A new numerical formalism is developed to extract the effective parameters of metamaterials formed by periodic arrangements of arbitrarily shaped dielectric/metallic inclusions embedded in dielectric/metallic hosts. Some fundamental topics such as negative refraction, the Poynting vector and other energy relations are discussed and illustrated with numerical examples. A novel metamaterial configuration that permits achieving a broadband DNG response as well as superlensing is proposed. A new numerical formalism is proposed to solve the Maxwell’s equations in scenarios wherein electromagnetic waves interact with arbitrary shaped spatially dispersive wire media bodies. Using this numerical formalism, some exciting applications are proposed for a class of wire media known as double wire medium. The possibility of enhancing the magnetic field at the tip of tapered double wire medium waveguide is discussed. Finally, rooted in the anomalous properties of the double wire medium, an exciting solution to suppress the chromatic aberrations inherent to singlematerial glass lenses is proposed.
No último par de décadas, a comunidade científica tem dado grande atenção a uma notável classe de materiais artificiais modernos, os chamados metamateriais. Esta classe de materiais artificiais é caraterizada por propriedades eletromagnéticas extraordinárias e pouco usuais, e tem naturalmente atraído investigadores em todo o mundo. Demonstrou-se que estes materiais têm aplicações interessantes em áreas emergentes como a nanofotónica e a plasmónica. A caraterização do comportamento electromagnético em metamateriais é, portanto, cada vez mais importante. Esta tese é dedicada ao estudo de métodos numéricos baseados em teoria de meio efetivo para caraterizar a resposta eletromagnética de metamateriais não-locais. Um novo formalismo numérico é desenvolvido para extrair os parâmetros efetivos de metamateriais formados por arranjos periódicos de inclusões dielétricas/metálicas com forma arbitrária, inseridas em meios dielétricos/metálicos. Alguns tópicos fundamentais tais como índice de refração negativo, o vetor de Poynting e relações de energia, são discutidos e ilustrados com exemplos numéricos. Uma nova configuração metamaterial é proposta para atingir uma resposta DNG de banda larga, bem como superlensing. Um novo formalismo numérico é desenvolvido para resolver as equações de Maxwell em cenários em que as ondas eletromagnéticas interagem com formas arbitrárias de meios espacialmente dispersivos formados por arranjos de fios metálicos. Usando este formalismo numérico, são discutidas algumas aplicações interessantes para uma classe de fios conhecida como double wire medium. A possibilidade de concentrar o campo magnético na extremidade de um guia de ondas afunilado formado pelo double wire medium, é discutida. Finalmente, baseada nas propriedades anómalas do double wire medium, é proposta uma interessante solução para suprimir as aberrações cromáticas inerentes às lentes compostas por um único vidro.

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Actes de conférences sur le sujet "Superlensing"

Zhang, Xiang. « High Frequency Metamaterials and Optical Superlensing ». Dans Frontiers in Optics. Washington, D.C. : OSA, 2005. http://dx.doi.org/10.1364/fio.2005.fmg1.

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Zapata-Rodríguez, Carlos J., David Pastor, María T. Caballero et Juan J. Miret. « Diffraction-managed superlensing using metallodielectric heterostructures ». Dans SPIE Photonics Europe, sous la direction de Allan D. Boardman, Nigel P. Johnson et Richard W. Ziolkowski. SPIE, 2012. http://dx.doi.org/10.1117/12.921882.

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Keys, Elizabeth, Sergei Mistyuk, Christopher Keys et Gary Shoemaker. « Exploring Lens Geometry for Superlensing in an Electrostatic Pendry Lens ». Dans Frontiers in Optics. Washington, D.C. : OSA, 2017. http://dx.doi.org/10.1364/fio.2017.jtu2a.49.

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Basharin, A. A., M. Kafesaki, E. N. Economou, C. M. Soukoulis et Dmitry N. Chigrin. « Superlensing Effects in Anisotropic Eutectic Metamaterials in the THz Range ». Dans THE FOURTH INTERNATIONAL WORKSHOP ON THEORETICAL AND COMPUTATIONAL NANOPHOTONICS : TaCoNa-Photonics 2011. AIP, 2011. http://dx.doi.org/10.1063/1.3644213.

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Zapata-Rodríguez, Carlos J., David Pastor, María T. Caballero et Juan J. Miret. « Plasmonic stratified devices for superlensing in the self-focusing regime ». Dans Frontiers in Optics. Washington, D.C. : OSA, 2012. http://dx.doi.org/10.1364/fio.2012.ftu3a.64.

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Ahmed, Hossain, Riaz Ahmed et Sourav Banerjee. « Butterfly metamaterial for acoustic hologramic imaging through superlensing capability (Conference Presentation) ». Dans Health Monitoring of Structural and Biological Systems XII, sous la direction de Tribikram Kundu. SPIE, 2018. http://dx.doi.org/10.1117/12.2296630.

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Liu, Meiling, Maojin Yun, Feng Xia et Jian Liang. « Negative refraction and superlensing in two-dimensional triangular lattice graded photonic crystals ». Dans SPIE Optical Engineering + Applications, sous la direction de Shizhuo Yin et Ruyan Guo. SPIE, 2012. http://dx.doi.org/10.1117/12.928562.

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Qiong He, Shiyi Xiao, Xin Li et Lei Zhou. « Superlensing and hyperlensing effect realized with Optic-Null transformation optical medium based on metamaterials ». Dans 2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC). IEEE, 2015. http://dx.doi.org/10.1109/ursi-at-rasc.2015.7302952.

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Chen, Weiqiang, Mark D. Thoreson, Alexander V. Kildishev et Vladimir M. Shalaev. « Ultra-Thin Ultra-Smooth and Low-Loss Silver and Silver-Silica Composite Films for Superlensing Applications ». Dans Quantum Electronics and Laser Science Conference. Washington, D.C. : OSA, 2010. http://dx.doi.org/10.1364/qels.2010.qthe4.

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Elsayad, Kareem, et Katrin G. Heinze. « Temperature dependence of the near-field superlensing effect for single metal layers and stacked metal-dielectric films ». Dans SPIE NanoScience + Engineering, sous la direction de Mark I. Stockman. SPIE, 2010. http://dx.doi.org/10.1117/12.860927.

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