| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Singular optical propagation properties of two types of one-dimensional anti-PT-symmetric periodic ring optical waveguide networks |
| Yanglong Fan(樊阳龙), Xiangbo Yang(杨湘波)†, Huada Lian(练华达), Runkai Chen(陈润楷),Pengbo Zhu(朱蓬勃), Dongmei Deng(邓冬梅), Hongzhan Liu(刘宏展), and Zhongchao Wei(韦中超) |
| Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China |
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Abstract Two types of one-dimensional (1D) anti-PT-symmetric periodic ring optical waveguide networks, consisting of gain and loss materials, are constructed. The singular optical propagation properties of these networks are investigated. The results show that the system composed of gain materials exhibits characteristics of ultra-strong transmission and bidirectional reflection. Conversely, the system composed of loss materials demonstrates equal transmittance and reflectance at some frequencies. In both the systems, a new type of total reflection phenomenon is observed. When the imaginary part of the refractive indices of waveguide segments is smaller than 10-5, the system shows bidirectional transparency with the transmittance tending to be 1 and reflectivity to be smaller than 10-8 at some bands. When the refractive indices of the waveguide segments are real, the system will be bidirectional transparent at the full band. These findings may deepen the understanding of anti-PT-symmetric optical systems and optical waveguide networks, and possess potential applications in efficient optical energy storage, ultra-sensitive optical filters, ultra-sensitive all-optical switches, integrated optical chips, stealth physics, and so on.
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Received: 15 September 2023
Revised: 04 November 2023
Accepted manuscript online: 06 December 2023
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PACS:
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42.25.Bs
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(Wave propagation, transmission and absorption)
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11.30.Er
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(Charge conjugation, parity, time reversal, and other discrete symmetries)
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42.79.Gn
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(Optical waveguides and couplers)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11674107, 61475049, 11775083, 61774062, and 61771205). |
Corresponding Authors:
Xiangbo Yang
E-mail: xbyang@scnu.edu.cn
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Cite this article:
Yanglong Fan(樊阳龙), Xiangbo Yang(杨湘波), Huada Lian(练华达), Runkai Chen(陈润楷),Pengbo Zhu(朱蓬勃), Dongmei Deng(邓冬梅), Hongzhan Liu(刘宏展), and Zhongchao Wei(韦中超) Singular optical propagation properties of two types of one-dimensional anti-PT-symmetric periodic ring optical waveguide networks 2024 Chin. Phys. B 33 034201
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