Edge-Mode Lasing In 1D Topological Active Arrays

Abstract

We report the first observation of lasing topological edge states in a 1D Su-Schrieffer-Heeger active array of microring resonators. We show that the judicious use of non-Hermiticity can promote single edge-mode lasing in such arrays. Our experimental and theoretical results demonstrate that, in the presence of chiral-time symmetry, this non-Hermitian topological structure can experience phase transitions that are dictated by a complex geometric phase. Our work may pave the way towards understanding the fundamental aspects associated with the interplay among non-Hermiticity, nonlinearity, and topology in active systems.

Publication Date

3-15-2018

Publication Title

Physical Review Letters

Volume

120

Issue

11

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.120.113901

Socpus ID

85044237700 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85044237700

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