Bifurcated overtones of one-way localized Fabry-Pérot resonances in parity-time symmetric optical lattices  

作　　者：Fatma Nafaa Gaafer 沈亚西 彭玉桂 武爱民 张鹏 祝雪丰 

机构地区：[1]School of Physics Huazhong University of Science and Technology [2]State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences [3]State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of Sciences [4]Innovation Institute Huazhong University of Science and Technology

出　　处：《Chinese Physics B》2017年第7期178-182,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11674119,11404125,and 11574389);the financial support from the Bird Nest Plan of HUST,China;supported by One Hundred-Talent Plan of Chinese Academy of Sciences

摘　　要：Since the first observation of parity-time（PT） symmetry in optics, varied interesting phenomena have been discovered in both theories and experiments, such as PT phase transition and unidirectional invisibility, which turns PT-symmetric optics into a hotspot in research. Here, we report on the one-way localized Fabry-Pérot（FP） resonance, where a welldesigned PT optical resonator may operate at exceptional points with bidirectional transparency but unidirectional field localization. Overtones of such one-way localized FP resonance can be classified into a blue shifted branch and a red shifted branch. Therefore, the fundamental resonant frequency is not the lowest one. We find that the spatial field distributions of the overtones at the same absolute order are almost the same, even though their frequencies are quite different.Since the first observation of parity-time（PT） symmetry in optics, varied interesting phenomena have been discovered in both theories and experiments, such as PT phase transition and unidirectional invisibility, which turns PT-symmetric optics into a hotspot in research. Here, we report on the one-way localized Fabry-Pérot（FP） resonance, where a welldesigned PT optical resonator may operate at exceptional points with bidirectional transparency but unidirectional field localization. Overtones of such one-way localized FP resonance can be classified into a blue shifted branch and a red shifted branch. Therefore, the fundamental resonant frequency is not the lowest one. We find that the spatial field distributions of the overtones at the same absolute order are almost the same, even though their frequencies are quite different.

关 键 词：optical lattices parity-time symmetry Fabry-Pérot resonances unidirectional field localization 

分 类 号：O43[机械工程—光学工程]