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Observation of Unidirectional Solitonlike Edge States in Nonlinear Floquet Topological Insulators

Mukherjee, S and Rechtsman, MC (2021) Observation of Unidirectional Solitonlike Edge States in Nonlinear Floquet Topological Insulators. In: Physical Review X, 11 (4).

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Official URL: https://doi.org/10.1103/PhysRevX.11.041057


A salient feature of solid-state quantum-Hall-type topological materials in two dimensions is the presence of conducting electronic edge states that are insensitive to scattering by disorder. Such unidirectional edge states have been predicted and observed in many other experimental settings, including photonics, mechanical, and acoustic structures. It is of great interest to understand how topological states behave in the presence of interparticle interactions and nonlinearity. Here, we experimentally demonstrate backscatter-immune unidirectional solitonlike nonlinear states on the edge of photonic topological insulators consisting of laser-written waveguides. As a result of the optical Kerr nonlinearity of the ambient glass, the solitonlike wave packet forms a long-lived quasilocalized coherent structure that slowly radiates power into the bulk and along the edge. The realization of solitonlike edge states paves the way to an understanding of nonlinear and interacting topological systems. © 2021 authors. Published by the American Physical Society.

Item Type: Journal Article
Publication: Physical Review X
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to Authors
Keywords: Association reactions; Quantum theory; Solitons; Topological insulators; Topology, Edge state; Floquet; Mechanical structures; Photonic structure; Quantum hall; Salient features; Soliton-like; Topological insulators; Topological materials; Two-dimensions, Electric insulators
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Jan 2022 11:46
Last Modified: 27 Jan 2022 11:46
URI: http://eprints.iisc.ac.in/id/eprint/71037

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