Computing one-dimensional metasurfaces

Pendry, J. B.; Huidobro, Paloma A.; Ding, Kun

doi:10.1103/physrevb.99.085408

Cited by 11 publications

(13 citation statements)

References 26 publications

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“…They used a geometric singularity to control the global behavior of the spectrum: the discrete spectrum converges to the continuous one as the small thickness goes to zero. We refer to [64][65][66] for related works on the metasurfaces. In this work, we propose a metasurface which can generate a large class of simple to complex spectral patterns through only two geometric parameters.…”

Section: Resultsmentioning

confidence: 99%

Hybridization of singular plasmons via transformation optics

Ammari

2019

Proc. Natl. Acad. Sci. U.S.A.

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Surface plasmon resonances of metallic nanostructures offer great opportunities to guide and manipulate light on the nanoscale. In the design of novel plasmonic devices, a central topic is to clarify the intricate relationship between the resonance spectrum and the geometry of the nanostructure. Despite the many advances, the design becomes quite challenging when the desired spectrum is highly complex. Here we develop a new theoretical model for surface plasmons of interacting nanoparticles to reduce the complexity of the design process significantly. Our model is developed by combining plasmon hybridization theory with transformation optics, which yields an efficient way of simultaneously controlling both global and local features of the resonance spectrum. As an application, we propose a design of metasurface whose absorption spectrum can be controlled over a large class of complex patterns through only a few geometric parameters in an intuitive way. Our approach provides fundamental tools for the effective design of plasmonic metamaterials with on-demand functionality.

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Section: Resultsmentioning

confidence: 99%

Hybridization of singular plasmons via transformation optics

Ammari

2019

Proc. Natl. Acad. Sci. U.S.A.

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“…In order to improve the visibility of the bands, in this section we choose a small value for the electron scattering rate γ e = 2 meV, which, however does not affect the validity of our argument. The optical response is obtained via semi-analytical solutions calculated by transforming the full set of Maxwell's equations via transformation optics, and finding the poles of the reflection coefficient, as detailed in [34,35]. In addition, we verify our semi-analytical calculations by plotting the corresponding spectra obtained via finiteelement simulations performed with COMSOL Multiphysics.…”

Section: Realization Of Flat Bands By Conformal Symmetrymentioning

confidence: 95%

Plasmon Localization Assisted by Conformal Symmetry

Galiffi

Ding

et al. 2020

ACS Photonics

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Plasmonic systems have attracted remarkable interest due to their application to the subwavelength confinement of light and the associated enhancement of light-matter interactions. However, this requires light to dwell at a given spatial location over timescales longer than the coupling rate to any relevant loss mechanism. Here we develop a general strategy for the design of stopped-light plasmonic metasurfaces, by taking advantage of the conformal symmetry which underpins nearfield optics. By means of the analytical technique of transformation optics, we propose a class of plasmonic gratings which is able to achieve ultra-slow group velocities, effectively freezing surface plasmon polaritons in space over their whole lifetime. Our method can be universally applied to the localization of polaritons in metallic systems, as well as in highly doped semiconductors and even two-dimensional conductive and polar materials, and may find potential applications in nanofocusing, nano-imaging, spectroscopy and light-harvesting.

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“…Finally, we remark that the general scope of TO has enabled to fully take into account retardation effects by transforming the full set of Maxwell's equations. This enables the semi-analytical calculation of optical spectra for gratings of periods not limited to the very subwavelength regime, for arbitrary polarization states, and is exact at the level of Maxwell's equations [80].…”

Section: Designing Plasmonic Gratings With Transformation Opticsmentioning

confidence: 99%

Transformation optics for plasmonics: from metasurfaces to excitonic strong coupling

Huidobro¹,

Fernández‐Domínguez²

2020

Comptes Rendus. Physique

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We review the latest theoretical advances in the application of the framework of Transformation Optics for the analytical description of deeply sub-wavelength electromagnetic phenomena. First, we present a general description of the technique, together with its usual exploitation for metamaterial conception and optimization in different areas of wave physics. Next, we discuss in detail the design of plasmonic metasurfaces, including the description of singular geometries which allow for broadband absorption in ultrathin platforms. Finally, we discuss the quasi-analytical treatment of plasmon-exciton strong coupling in nanocavities at the single emitter level.Résumé. Nous passons en revue les dernières avancées dans l'application du cadre de l'optique transformationnelle pour la description analytique des phénomènes électromagnétiques en régime fortement sublongueur d'onde. En premier lieu, nous présentons une description générale de la technique, ainsi que son exploitation usuelle dans la conception et l'optimisation des métamatériaux dans différentes disciplines de la physique des ondes. En second lieu, nous discutons en détail de la conception de métasurfaces plasmoniques, y compris la description de géométries singulières qui permettent une absorption sur une large plage de fréquences dans les plates-formes ultra-minces. Enfin, nous discutons du traitement quasi-analytique du couplage fort plasmon-exciton dans les nanocavités au niveau d'un seul émetteur.

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Computing one-dimensional metasurfaces

Cited by 11 publications

References 26 publications

Hybridization of singular plasmons via transformation optics

Hybridization of singular plasmons via transformation optics

Plasmon Localization Assisted by Conformal Symmetry

Transformation optics for plasmonics: from metasurfaces to excitonic strong coupling

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