中国物理B ›› 2017, Vol. 26 ›› Issue (7): 74218-074218.doi: 10.1088/1674-1056/26/7/074218

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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

Fatma Nafaa Gaafer, Yaxi Shen(沈亚西), Yugui Peng(彭玉桂), Aimin Wu(武爱民), Peng Zhang(张鹏), Xuefeng Zhu(祝雪丰)   

  1. 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;
    4 Innovation Institute, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2017-01-16 修回日期:2017-03-17 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: Aimin Wu, Peng Zhang, Xuefeng Zhu E-mail:wuaimin@mail.sim.ac.cn;pengzhang@opt.ac.cn;xfzhu@hust.edu.cn

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

Fatma Nafaa Gaafer1, Yaxi Shen(沈亚西)1, Yugui Peng(彭玉桂)1, Aimin Wu(武爱民)2, Peng Zhang(张鹏)3, Xuefeng Zhu(祝雪丰)1,2,4   

  1. 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;
    4 Innovation Institute, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2017-01-16 Revised:2017-03-17 Online:2017-07-05 Published:2017-07-05
  • Contact: Aimin Wu, Peng Zhang, Xuefeng Zhu E-mail:wuaimin@mail.sim.ac.cn;pengzhang@opt.ac.cn;xfzhu@hust.edu.cn

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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 well-designed 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–, Pè, rot resonances, unidirectional field localization

Abstract:

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 well-designed 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.

Key words: optical lattices, parity-time symmetry, Fabry–, Pè, rot resonances, unidirectional field localization

中图分类号:  (Photonic bandgap materials)

  • 42.70.Qs
78.20.Bh (Theory, models, and numerical simulation) 73.20.At (Surface states, band structure, electron density of states)