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
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Topologically protected photonic transport in bi-anisotropic meta-waveguides
TL;DR: In this paper, a two-dimensional bi-anisotropic meta-waveguide is proposed for topologically nontrivial photonic phase and robust photonic transport, which can mimic the spin-orbital interaction in topological insulators and open a complete photonic topological band gap.
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Reconfigurable topological phononic crystal slabs
TL;DR: In this article, a two-dimensional reconfigurable phononic crystal slabs that support topologically protected edge states for Lamb waves is proposed, which can be employed for elastic-wave communications, signal processing, and sensing.
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Topological and flat-band states induced by hybridized linear interactions in one-dimensional photonic lattices
TL;DR: Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)================== CONICYTEECHNOLOGICA as mentioned in this paper )============CONICE-T FONDECT============1191205======1170917============Abdus Salam International Centre for Theoretical Physics ============Simons Foundation ======
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3D-Printed Terahertz Topological Waveguides
Muhammad Talal Ali Khan,Haisu Li,Nathan Nam Minh Duong,Andrea Blanco-Redondo,Shaghik Atakaramians +4 more
TL;DR: In this article, a planar air-channel metallic waveguide is integrated into an on-chip interconnect, and the relative size of the measured topological bandgap is ~12.5%, which entails significant improvement over all-silicon terahertz topological waveguides.
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Symmetry Classification of Topological Photonic Crystals
Giuseppe De Nittis,Max Lein +1 more
TL;DR: In this paper, it was shown that there are four topologically distinct types of media, of which only one, gyrotropic media, is topologically non-trivial in $d = 2, 3.
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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Topological insulators and superconductors
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.