摘要
In single microdisks,embedded active emitters intrinsically affect the cavity modes of the microdisks,resulting in trivial symmetric backscattering and low controllability.Here we demonstrate macroscopic control of the backscattering direction by optimizing the cavity size.The signature of the positive and negative backscattering directions in each single microdisk is confirmed with two strongly coupled microdisks.Furthermore,diabolical points are achieved at the resonance of the two microdisks,which agrees well with theoretical calculations considering the backscattering directions.Diabolical points in active optical structures pave the way for an implementation of quantum information processing with geometric phase in quantum photonic networks.
基金
supported by the National Natural Science Foundation of China under Grant No.11934019,No.11721404,No.51761145104,No.61675228,and No.11874419
the Ministry of Science and Technology of China under Grant No.2016YFA0200400
the Strategic Priority Research Program under Grant No.XDB07030200,No.XDB28000000,and No.XDB07020200
the Instrument Developing Project under Grant No.YJKYYQ20180036
the Interdisciplinary Innovation Team of the Chinese Academy of Sciences
the Key R&D Program of Guangdong Province under Grant No.2018B030329001.
