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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Self-Isolated Raman Lasing with a Chiral Dielectric Metasurface.
TL;DR: In this article, a high-Q chiral metasurface design was proposed to compactly isolate integrated light sources by directly tailoring the emission properties of the light source itself.
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Fractal photonic topological insulators
Tobias Biesenthal,Lukas J. Maczewsky,Zhaoju Yang,Mark Kremer,Mordechai Segev,Alexander Szameit,Matthias Heinrich +6 more
TL;DR: In this paper , the first experimental observation of a fractal topological insulator is presented, where the self-similar properties of the Sierpinski gasket systematically enhance the transport of light in its topologically protected edge states.
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Michelle Wang,Cooper Doyle,Bryn Bell,Matthew J. Collins,Eric Magi,Benjamin J. Eggleton,Mordechai Segev,Andrea Blanco-Redondo +7 more
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Acoustic frequency filter based on anisotropic topological phononic crystals.
TL;DR: In this article, a two-dimensional anisotropic phononic crystal was used for the design of an acoustic frequency filter, which exhibits either a directional or a combined (global + directional) bandgap at certain frequency regions, depending on the geometry.
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Geometric interpretations for resonances of plasmonic nanoparticles.
TL;DR: In this paper, a geometric model of surface plasmon polaritons (SPPs) was proposed to explain the anomalous scattering features of particle scattering in the field of Plasmonics, including higher order modes supported at lower frequencies and blueshift of the resonance with increasing particle sizes.
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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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