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Topological Floquet edge states in periodically curved waveguides

Zhu, Bo; Zhong, Honghua; Ke, Yongguan; Qin, Xizhou; Sukhorukov, Andrey; Kivshar, Yuri; Lee, C.-H.


We study the Floquet edge states in arrays of periodically curved optical waveguides described by the modulated Su-Schrieffer-Heeger model. Beyond the bulk-edge correspondence, our study explores the interplay between band topology and periodic modulations. By analyzing the quasienergy spectra and Zak phase, we reveal that, although topological and nontopological edge states can exist for the same parameters, they cannot appear in the same spectral gap. In the high-frequency limit, we find...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Physical Review A
DOI: 10.1103/PhysRevA.98.013855
Access Rights: Open Access


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