Unidirectional invisibility induced by parity-time symmetric circuit

被引：0

作者：

Bo Lv

Jiahui Fu

Bian Wu

Rujiang Li

Qingsheng Zeng

Xinhua Yin

Qun Wu

Lei Gao

Wan Chen

Zhefei Wang

Zhiming Liang

Ao Li

Ruyu Ma

机构：

[1] Microwave and Electromagnetic Laboratory,

[2] Harbin Institute of Technology,undefined

[3] No. 92,undefined

[4] Xidazhi Street,undefined

[5] Nangang District,undefined

[6] Harbin City,undefined

[7] School of Electronic Engineering,undefined

[8] Xidian University,undefined

[9] College of Information Science and Electronic Engineering,undefined

[10] Zhejiang University,undefined

[11] Propagation Group,undefined

[12] Wireless Technologies Branch,undefined

[13] Communications Research Centre Canada,undefined

[14] Government of Canada,undefined

[15] 3701 Carling Ave.,undefined

[16] Box 11490,undefined

[17] Station H,undefined

[18] Harbin medical university,undefined

[19] No. 157,undefined

[20] Baojian Street,undefined

[21] Nangang District,undefined

来源：

Scientific Reports | / 7卷

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D O I：

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学科分类号：

摘要：

Parity-time (PT) symmetric structures present the unidirectional invisibility at the spontaneous PT-symmetry breaking point. In this paper, we propose a PT-symmetric circuit consisting of a resistor and a microwave tunnel diode (TD) which represent the attenuation and amplification, respectively. Based on the scattering matrix method, the circuit can exhibit an ideal unidirectional performance at the spontaneous PT-symmetry breaking point by tuning the transmission lines between the lumped elements. Additionally, the resistance of the reactance component can alter the bandwidth of the unidirectional invisibility flexibly. Furthermore, the electromagnetic simulation for the proposed circuit validates the unidirectional invisibility and the synchronization with the input energy well. Our work not only provides an unidirectional invisible circuit based on PT-symmetry, but also proposes a potential solution for the extremely selective filter or cloaking applications.

引用

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