BROWSE

Related Scientist

Leykam, Daniel's photo.

Leykam, Daniel
복잡계 이론물리 연구단
more info

ITEM VIEW & DOWNLOAD

Nontrivial coupling of light into a defect: the interplay of nonlinearity and topology

Cited 0 time in webofscience Cited 0 time in scopus
11 Viewed 0 Downloaded
Title
Nontrivial coupling of light into a defect: the interplay of nonlinearity and topology
Author(s)
Shiqi Xia; Dario Jukić; Nan Wang; Daria Smirnova; Lev Smirnov; Liqin Tang; Daohong Song; Alexander Szameit; Daniel Leykam; Jingjun Xu; Zhigang Chen; Hrvoje Buljan
Subject
EDGE STATES, ; SOLITONS, ; NUMBER
Publication Date
2020-08
Journal
Light-Science & Applications, v.9, no.1, pp.147
Publisher
Chinese Academy of Sciences / Springer Nature
Abstract
© 2020, The Author(s). The flourishing of topological photonics in the last decade was achieved mainly due to developments in linear topological photonic structures. However, when nonlinearity is introduced, many intriguing questions arise. For example, are there universal fingerprints of the underlying topology when modes are coupled by nonlinearity, and what can happen to topological invariants during nonlinear propagation? To explore these questions, we experimentally demonstrate nonlinearity-induced coupling of light into topologically protected edge states using a photonic platform and develop a general theoretical framework for interpreting the mode-coupling dynamics in nonlinear topological systems. Performed on laser-written photonic Su-Schrieffer-Heeger lattices, our experiments show the nonlinear coupling of light into a nontrivial edge or interface defect channel that is otherwise not permissible due to topological protection. Our theory explains all the observations well. Furthermore, we introduce the concepts of inherited and emergent nonlinear topological phenomena as well as a protocol capable of revealing the interplay of nonlinearity and topology. These concepts are applicable to other nonlinear topological systems, both in higher dimensions and beyond our photonic platform. Topological photonics: nonlinear couplingAn engineered photonic system has provided insights into the interplay between nonlinearity and topology. Shiqi Xia and coworkers used laser-writing technique to fabricate refractive-index patterns that form a Su-Schrieffer-Heeger lattice in a nonlinear optical crystal of strontium-barium-niobate (SBN:61), a well-known photorefractive material. Due to the presence of the nonlinearity, two optical beams of sufficient power propagating in different directions can, when they collide, couple into a non-trivial interface state in the system, which is otherwise not accessible due to topological protection. Theoretical analysis correctly explains the observed behavior and the nonlinear coupling phenomenon. The researchers say that their findings are of a general nature and can be applied to other nonlinear topological systems
URI
https://pr.ibs.re.kr/handle/8788114/7692
DOI
10.1038/s41377-020-00371-y
ISSN
2047-7538
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse