Photonic topological insulators
Alexander B. Khanikaev,S. Hossein Mousavi,Wang-Kong Tse,Mehdi Kargarian,Allan H. MacDonald,Gennady Shvets +5 more
TLDR
It is shown that metacrystals-superlattices of metamaterials with judiciously designed properties-provide a platform for designing topologically non-trivial photonic states, similar to those identified for condensed-matter topological insulators.Abstract:
Recent progress in understanding the topological properties of condensed matter has led to the discovery of time-reversal-invariant topological insulators. A remarkable and useful property of these materials is that they support unidirectional spin-polarized propagation at their surfaces. Unfortunately topological insulators are rare among solid-state materials. Using suitably designed electromagnetic media (metamaterials) we theoretically demonstrate a photonic analogue of a topological insulator. We show that metacrystals-superlattices of metamaterials with judiciously designed properties-provide a platform for designing topologically non-trivial photonic states, similar to those that have been identified for condensed-matter topological insulators. The interfaces of the metacrystals support helical edge states that exhibit spin-polarized one-way propagation of photons, robust against disorder. Our results demonstrate the possibility of attaining one-way photon transport without application of external magnetic fields or breaking of time-reversal symmetry. Such spin-polarized one-way transport enables exotic spin-cloaked photon sources that do not obscure each other.read more
Citations
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Electromagnetic confinement via spin-orbit interaction in anisotropic dielectrics
TL;DR: In this article, the Pancharatnam-Berry phase has been investigated in uniaxial dielectrics with a transversely varying orientation of the optic axis, the latter staying orthogonal everywhere to the propagation direction.
Journal ArticleDOI
Topological Surface Acoustic Waves
Zi-Dong Zhang,Si-Yuan Yu,Hao Ge,Ji-Qian Wang,Hong-Fei Wang,Kangfu Liu,Tao Wu,Cheng He,Ming-Hui Lu,Yan-Feng Chen +9 more
TL;DR: In this article, the authors implemented a topological insulator for surface acoustic wave (SAW) topology based on a monolithically integrated platform using a miniature acoustic resonator array working tens of megahertz on a piezoelectric halfspace.
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Nonlinear control of PT-symmetry and non-Hermitian topological states
Shiqi Xia,Dimitrios Kaltsas,Daohong Song,I. Komis,Jingjun Xu,Alexander Szameit,Hrvoje Buljan,Konstantinos G. Makris,Zhigang Chen +8 more
TL;DR: In this paper, a nonlinear non-Hermitian topological platform for control of parity-time symmetry and topological edge states is established, where optical nonlinearity effectively modulates the gain and loss of a topological interface waveguide in a non-hermitian Su-Schrieffer-Heeger lattice.
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Quantized Angular Momentum in Topological Optical Systems
TL;DR: It is demonstrated that the photonic Chern number can be understood as the quantum of the light-angular momentum in a photonic insulator cavity, and can be extended to systems without a topological classification, and in such a case the “quantum” of the angular momentum density is determined by the net number of unidirectional edge states supported by the cavity walls.
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Asymmetric parametric generation of images with nonlinear dielectric metasurfaces
Aziza Gril-Mariotte,Wen-Hua Kuo +1 more
TL;DR: In this paper , the authors demonstrate asymmetric parametric generation of light in nonlinear metasurfaces by assembling dissimilar nonlinear dielectric resonators into translucent metamurfaces that produce images in the visible spectral range.
References
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Negative Refraction Makes a Perfect Lens
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The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
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TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.