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Leykam, Daniel
복잡계 이론물리 연구단
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Probing Band Topology Using Modulational Instability

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Title
Probing Band Topology Using Modulational Instability
Author(s)
Daniel Leykam; Ekaterina Smolina; Aleksandra Maluckov; Sergej Flach; Daria A. Smirnova
Publication Date
2021-02-17
Journal
PHYSICAL REVIEW LETTERS, v.126, no.7
Publisher
AMER PHYSICAL SOC
Abstract
We analyze the modulational instability of nonlinear Bloch waves in topological photonic lattices. In the initial phase of the instability development captured by the linear stability analysis, long wavelength instabilities and bifurcations of the nonlinear Bloch waves are sensitive to topological band inversions. At longer timescales, nonlinear wave mixing induces spreading of energy through the entire band and spontaneous creation of wave polarization singularities determined by the band Chern number. Our analytical and numerical results establish modulational instability as a tool to probe bulk topological invariants and create topologically nontrivial wave fields.
URI
https://pr.ibs.re.kr/handle/8788114/11763
DOI
10.1103/PhysRevLett.126.073901
ISSN
0031-9007
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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