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
More filters
Journal ArticleDOI
Active topological photonics
Yasutomo Ota,Kenta Takata,Tomoki Ozawa,Alberto Amo,Zhetao Jia,Boubacar Kante,Masaya Notomi,Masaya Notomi,Yasuhiko Arakawa,Satoshi Iwamoto +9 more
TL;DR: In this article, the authors review the cutting-edge research on active topological photonics, in which optical gain plays a pivotal role, and discuss recent realizations of topological lasers of various kinds, together with the underlying physics explaining the emergence of topologically edge modes.
Journal ArticleDOI
Theory of Wave Propagation in Magnetized Near-Zero-Epsilon Metamaterials: Evidence for One-Way Photonic States and Magnetically Switched Transparency and Opacity
Arthur R. Davoyan,Nader Engheta +1 more
TL;DR: In this theoretical study, it is demonstrated that surface waves at the interface between either a transparent or an opaque Hall medium and a homogeneous medium may, under certain conditions, be predominantly one way.
Journal ArticleDOI
Coriolis Force Induced Quantum Hall Effect for Phonons
TL;DR: In this article, a two-dimensional mass-spring system with Honeycomb lattice for mimicking phononic quantum Hall effect is proposed, which shows the existence of Dirac cones and unconventional edge states that is similar to the vibrational modes in graphene.
Journal ArticleDOI
Two-Dimensional Topological Polariton Laser.
TL;DR: Gain concentrated along the edge of the insulator can counteract intrinsic losses in such a selective way that the topologically protected edge states become amplified, while bulk modes remain damped.
Journal ArticleDOI
Scattering-free edge states between heterogeneous photonic topological insulators
Tzuhsuan Ma,Gennady Shvets +1 more
TL;DR: In this paper, a set of three compatible photonic structures emulating quantum topologically insulating phases corresponding to Hall, spin-Hall, and valley-Hall effects are proposed and it is shown that an interface between any two of these photonic topological insulators supports scattering-free edge states.
References
More filters
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
Journal ArticleDOI
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.