Edge-Mode Lasing in 1D Topological Active Arrays

Midya Parto, Steffen Wittek, Hossein Hodaei, Gal Harari, Miguel A. Bandres, Jinhan Ren, Mikael C. Rechtsman, Mordechai Segev, Demetrios N. Christodoulides, Mercedeh Khajavikhan

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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.

Original languageEnglish (US)
Article number113901
JournalPhysical Review Letters
Volume120
Issue number11
DOIs
StatePublished - Mar 15 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Parto, M., Wittek, S., Hodaei, H., Harari, G., Bandres, M. A., Ren, J., Rechtsman, M. C., Segev, M., Christodoulides, D. N., & Khajavikhan, M. (2018). Edge-Mode Lasing in 1D Topological Active Arrays. Physical Review Letters, 120(11), [113901]. https://doi.org/10.1103/PhysRevLett.120.113901