Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios

doi:10.1088/1674-1056/ab3f92

中国物理B ›› 2019, Vol. 28 ›› Issue (10): 104208-104208.doi: 10.1088/1674-1056/ab3f92

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

Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios

Jia-Ye Wu(吴嘉野), Xu-Hang Wu(吴栩航), Xiang-Bo Yang(杨湘波), Hai-Ying Li(李海盈)

1 Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China;
2 Laboratory of Nonlinear Fiber Optics, School of Electronic and Computer Engineering, Peking University, Shenzhen 518055, China

收稿日期:2019-06-10 修回日期:2019-07-17 出版日期:2019-10-05 发布日期:2019-10-05
通讯作者: Xiang-Bo Yang E-mail:xbyang@scnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11674107, 61475049, 11775083, 61875057, 61774062, and 61771205) and Special Funds for the Cultivation of Guangdong College Students' Scientific and Techonlogical Innovation, China (Grant No. pdjhb0139).

Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios

Jia-Ye Wu(吴嘉野)^1,2, Xu-Hang Wu(吴栩航)¹, Xiang-Bo Yang(杨湘波)¹, Hai-Ying Li(李海盈)¹

1 Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China;
2 Laboratory of Nonlinear Fiber Optics, School of Electronic and Computer Engineering, Peking University, Shenzhen 518055, China

Received:2019-06-10 Revised:2019-07-17 Online:2019-10-05 Published:2019-10-05
Contact: Xiang-Bo Yang E-mail:xbyang@scnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11674107, 61475049, 11775083, 61875057, 61774062, and 61771205) and Special Funds for the Cultivation of Guangdong College Students' Scientific and Techonlogical Innovation, China (Grant No. pdjhb0139).

摘要/Abstract

摘要： By adjusting the waveguide length ratio, we study the extraordinary characteristics of electromagnetic waves propagating in one-dimensional (1D) parity-time-symmetric (PT-symmetric) two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios respectively. It is found that the number and the corresponding frequencies of the extremum spontaneous PT-symmetric breaking points are dependent on the waveguide length ratio. Near the extremum breaking points, ultrastrong extraordinary transmissions are created and the maximal can arrive at, respectively, 2.4079×10¹⁴ and 4.3555×10¹³ in both kinds of networks. However, bidirectional invisibility can only be produced by the networks with broken integer waveguide length ratio, whose mechanism is explained in detail from the perspective of photonic band structure. The findings of this work can be useful optical characteristic control in the fabrication of PT-symmetric optical waveguide networks, which possesses great potential in designing optical amplifiers, optical energy saver devices, and special optical filters.

关键词: parity-time symmetry, optical waveguide network, integer broken ratios

Abstract: By adjusting the waveguide length ratio, we study the extraordinary characteristics of electromagnetic waves propagating in one-dimensional (1D) parity-time-symmetric (PT-symmetric) two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios respectively. It is found that the number and the corresponding frequencies of the extremum spontaneous PT-symmetric breaking points are dependent on the waveguide length ratio. Near the extremum breaking points, ultrastrong extraordinary transmissions are created and the maximal can arrive at, respectively, 2.4079×10¹⁴ and 4.3555×10¹³ in both kinds of networks. However, bidirectional invisibility can only be produced by the networks with broken integer waveguide length ratio, whose mechanism is explained in detail from the perspective of photonic band structure. The findings of this work can be useful optical characteristic control in the fabrication of PT-symmetric optical waveguide networks, which possesses great potential in designing optical amplifiers, optical energy saver devices, and special optical filters.

Key words: parity-time symmetry, optical waveguide network, integer broken ratios

中图分类号: (Optical system design)

42.15.Eq

42.25.Bs (Wave propagation, transmission and absorption) 42.82.Et (Waveguides, couplers, and arrays)

吴嘉野, 吴栩航, 杨湘波, 李海盈. Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios[J]. 中国物理B, 2019, 28(10): 104208-104208.

Jia-Ye Wu(吴嘉野), Xu-Hang Wu(吴栩航), Xiang-Bo Yang(杨湘波), Hai-Ying Li(李海盈). Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios[J]. Chin. Phys. B, 2019, 28(10): 104208-104208.

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Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios

Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios

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