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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Advances in synthetic gauge fields for light through dynamic modulation
Daniel R. Hey,Enbang Li +1 more
TL;DR: In this paper, the authors reviewed dynamic modulation as a process for breaking the time-reversal symmetry of light and generating a synthetic gauge field, and discussed its role in topological photonics.
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Elimination of polarization degeneracy in circularly symmetric bianisotropic waveguides: a decoupled case.
Jing Xu,Bingbing Wu,Yuntian Chen +2 more
TL;DR: It is found that the polarization degeneracy in circularly symmetric waveguides can be eliminated, by introducing intrinsic crossing coupling between electric and magnetic moments in the constituent units of the waveguide media.
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Magnetic-Optic Effect-Based Topological State: Realization and Application
TL;DR: In this article , a review summarizes various topological states based on the magnetic-optic (MO) effect and provides reference mechanisms for light one-way transmission and light control.
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Transverse angular momentum in topological photonic crystals
TL;DR: In this paper, a transverse orbital angular momentum mode with alternating-sign topological charge was found at the boundary of two topologically-distinct silicon photonic crystals, and the authors showed that unidirectional transport is robust to the working frequency even when the ring size or location of pseudo-spin source varies in a certain range.
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Bloch theory-based gradient recovery method for computing topological edge modes in photonic graphene
Hailong Guo,Xu Yang,Yi Zhu +2 more
TL;DR: This paper proposes a novel gradient recovery method based on Bloch theory for the computation of topological edge modes in photonic graphene that provides higher order accuracy with the help of gradient recovery technique.
References
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Xiao-Liang Qi,Shou-Cheng Zhang +1 more
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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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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.