Low-threshold topological nanolasers based on the second-order corner state  

作　　者：Weixuan Zhang Xin Xie Huiming Hao Jianchen Dang Shan Xiao Shushu Shi Haiqiao Ni Zhichuan Niu Can Wang Kuijuan Jin Xiangdong Zhang Xiulai Xu 

机构地区：[1]Key Laboratory of advanced optoelectronic quantum architecture and measurements of Ministry of Education,School of Physics,Beijing Institute of Technology,100081 Beijing,China [2]Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic Systems,Micro-nano Center,School of Physics,Beijing Institute of Technology,100081 Beijing,China [3]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [4]CAS Center for Excellence in Topological Quantum Computation and School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [5]State Key Laboratory of Superlattices and Microstructures,Institute of Semiconductors Chinese Academy of Sciences,Beijing 100083,China [6]Songshan Lake Materials Laboratory,Dongguan,Guangdong 523808,China

出　　处：《Light(Science & Applications)》2020年第1期968-973,共6页光（科学与应用)（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants nos.11934019,11721404,51761145104,61675228,and 11874419);the National Key R&D Program of China(Grant nos.2017YFA0303800 and 2018YFA0306101);the Key R&D Program of Guangdong Province(Grant no.2018B030329001);the Strategic Priority Research Program(Grant no.XDB28000000);the Instrument Developing Project(Grant no.YJKYYQ20180036);the Interdisciplinary Innovation Team of the Chinese Academy of Sciences.

摘　　要：Topological lasers are immune to imperfections and disorder.They have been recently demonstrated based on many kinds of robust edge states,which are mostly at the microscale.The realization of 2D on-chip topological nanolasers with a small footprint,a low threshold and high energy efficiency has yet to be explored.Here,we report the first experimental demonstration of a topological nanolaser with high performance in a 2D photonic crystal slab.A topological nanocavity is formed utilizing the Wannier-type 0D corner state.Lasing behaviour with a low threshold of approximately 1μW and a high spontaneous emission coupling factor of 0.25 is observed with quantum dots as the active material.Such performance is much better than that of topological edge lasers and comparable to that of conventional photonic crystal nanolasers.Our experimental demonstration of a low-threshold topological nanolaser will be of great significance to the development of topological nanophotonic circuitry for the manipulation of photons in classical and quantum regimes.

关 键 词：QUANTUM utilizing REALIZATION 

分 类 号：TN248[电子电信—物理电子学]