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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Higher-order valley vortices enabled by synchronized rotation in a photonic crystal
TL;DR: In this article , a two-dimensional version of higher-order topological insulator (HOTI) was designed by rotation in a triangular photonic lattice with symmetry.
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Emission of R6G dye in Fabry–Perot cavities in weak and strong coupling regimes
TL;DR: In this article, spectra and angular distribution of emission in Fabry-Perot cavities formed by two silver mirrors separated by a layer of poly (methyl methacrylate) polymer doped with rhodamine 6G (R6G) dye in low (20g/l) and high (200g/L) concentrations were studied.
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Emulating nonreciprocity via direction-dependent excitation of spoof surface plasmon polaritons
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The Existence of Topological Edge States in Honeycomb Plasmonic Lattices
Li Wang,Ruo-Yang Zhang,Ruo-Yang Zhang,Meng Xiao,Meng Xiao,Dezhuan Han,Che Ting Chan,Weijia Wen +7 more
TL;DR: In this paper, the band properties of 2D honeycomb plasmonic lattices consisting of metallic nanoparticles were investigated by means of the coupled dipole method and quasi-static approximation.
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Ferromagnetic resonance isolator based on a photonic crystal structure with terahertz vortices
TL;DR: A new terahertz isolator based on the ferromagnetic resonance effect is suggested and analyzed and a two-dimensional photonic crystal consisting of a square lattice of gallium arsenide rods has been employed in the design of the device.
References
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Colloquium: Topological insulators
M. Z. Hasan,Charles L. Kane +1 more
TL;DR: In this paper, the theoretical foundation for topological insulators and superconductors is reviewed and recent experiments are described in which the signatures of topologically insulators have been observed.
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Xiao-Liang Qi,Shou-Cheng Zhang +1 more
TL;DR: Topological superconductors are new states of quantum matter which cannot be adiabatically connected to conventional insulators and semiconductors and are characterized by a full insulating gap in the bulk and gapless edge or surface states which are protected by time reversal symmetry.
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Negative Refraction Makes a Perfect Lens
TL;DR: The authors' simulations show that a version of the lens operating at the frequency of visible light can be realized in the form of a thin slab of silver, which resolves objects only a few nanometers across.
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The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
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Experimental Verification of a Negative Index of Refraction
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.