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

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-w...

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Published inChinese physics B Vol. 26; no. 7; pp. 178 - 182
Main Authors Gaafer, Fatma Nafaa, Shen, Yaxi, Peng, Yugui, Wu, Aimin, Zhang, Peng, Zhu, Xuefeng
Format Journal Article
LanguageEnglish
Published 01.06.2017
Subjects
光学晶格
共振
单向
奇偶
对称性
局部法
干涉仪
泛音
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/26/7/074218

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Summary: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.
Bibliography:optical lattices; parity-time symmetry; Fabry-Pérot resonances; unidirectional field localization
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.
Fatma Nafaa Gaafer1,Yaxi Shen1,Yugui Peng1,Aimin Wu2,Peng Zhang3,Xuefeng Zhu1,2,4 （ 1 School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; 2 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China ;3 State Key Laboratory of Transient Optics and Photonics, Xi＇an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi＇ an 710119, China ;4Innovation Institute, Huazhong University of Science and Technology, Wuhan 430074, China）
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/7/074218