Parto Midya, Wittek Steffen, Hodaei Hossein, Harari Gal, Bandres Miguel A, Ren Jinhan, Rechtsman Mikael C, Segev Mordechai, Christodoulides Demetrios N, Khajavikhan Mercedeh
CREOL/College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA.
Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Phys Rev Lett. 2018 Mar 16;120(11):113901. doi: 10.1103/PhysRevLett.120.113901.
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.
我们报道了在一维微环谐振器的Su-Schrieffer-Heeger有源阵列中首次观测到激光拓扑边缘态。我们表明，明智地利用非厄米性可以促进此类阵列中的单边模激光发射。我们的实验和理论结果表明，在手性时间对称性存在的情况下，这种非厄米拓扑结构可以经历由复几何相位决定的相变。我们的工作可能为理解有源系统中非厄米性、非线性和拓扑之间相互作用的基本方面铺平道路。
