Self-induced transparency in a perfectly absorbing chiral second-harmonic generator  

作　　者：Jiankun Hou Jintian Lin Jiefu Zhu Guolin Zhao Yao Chen Fangxing Zhang Yuanlin Zheng Xianfeng Chen Ya Cheng Li Ge Wenjie Wan 

机构地区：[1]State Key Laboratory of Advanced Optical Communication Systems and Networks,University of Michigan-Shanghai Jiao Tong University Joint Institute,Shanghai Jiao Tong University,200240 Shanghai,China [2]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics(SIOM),CAS Center for Excellence in Ultra-Intense Laser Science,Chinese Academy of Sciences(CAS),201800 Shanghai,China [3]Department of Physics and Astronomy,Shanghai Jiao Tong University,200240 Shanghai,China [4]School of Physics and Electronic Science,East China Normal University,200241 Shanghai,China [5]Department of Physics and Astronomy,College of Staten Island,the City University of New York,10314 New York,USA

出　　处：《PhotoniX》2022年第1期126-138,共13页智汇光学（英文）

基　　金：supported by the National Science Foundation of China(Grant No.92050113,No.12274295,No.11304201);National key research and development program(Grant No.2016YFA0302500,2017YFA0303700);Shanghai MEC Scientific Innovation Program(Grant No.E00075).

摘　　要：Transparency and perfect absorption are two contradictory terms;a perfect absorber never permits waves to transmit through.However,this statement only remains true in the linear regime,where the nonlinearity has been omitted and the physical system like the perfect absorber is not affected by the incoming waves.Here we experimentally demonstrate an intriguing self-induced transparency effect in a perfectly absorbing optical microcavity,which perfectly absorbs any incoming waves at the low power level,but allows a portion of waves to be transmitted at the higher power due to the nonlinear coupling between the fundamental and its second harmonic modes.Moreover,the asymmetric scattering nature of the microcavity enables a chiral and unidirectional reflection in one of the input ports,this leads to asymmetric and chiral coherent control of the perfect absorption states through phase varying.More importantly,such chiral behaviors also empower the chiral emission of second-harmonic generation with a high distinct ratio in the transparency state.These results pave the way for controllable transparency in a wide range of fields in optics,microwaves,acoustics,mechanics,and matter waves.

关 键 词：CPA MICRORESONATOR Self-induced transparency CHIRAL SHG 

分 类 号：TN2[电子电信—物理电子学]