Extended SSH Model in Non-Hermitian Waveguides with Alternating Real and Imaginary Couplings

We studied the topological properties of an extended Su–Schrieffer–Heeger (SSH) model composed of a binary waveguide array with alternating real and imaginary couplings. The topological invariant of the periodic structures remained quantized with chiral symmetry even though the system was non-Hermit...

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Bibliographic Details

Published in:	Applied Sciences
Main Authors:	Ziwei Fu, Nianzu Fu, Huaiyuan Zhang, Zhe Wang, Dong Zhao, Shaolin Ke
Format:	Article
Language:	English
Published:	MDPI AG 2020-05-01
Subjects:	topological phase waveguides non-Hermitian optics
Online Access:	https://www.mdpi.com/2076-3417/10/10/3425