Unidirectional invisibility induced by parity-time symmetric circuit

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

doi:10.1038/srep40575

Unidirectional invisibility induced by parity-time symmetric circuit

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	40575
Journal	Scientific Reports
Volume	7
DOIs	https://doi.org/10.1038/srep40575
State	Published - 18 Jan 2017
Externally published	Yes

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title = "Unidirectional invisibility induced by parity-time symmetric circuit",

abstract = "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.",

author = "Bo Lv and Jiahui Fu and Bian Wu and Rujiang Li and Qingsheng Zeng and Xinhua Yin and Qun Wu and Lei Gao and Wan Chen and Zhefei Wang and Zhiming Liang and Ao Li and Ruyu Ma",

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doi = "10.1038/srep40575",

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T1 - Unidirectional invisibility induced by parity-time symmetric circuit

AU - Lv, Bo

AU - Fu, Jiahui

AU - Wu, Bian

AU - Li, Rujiang

AU - Zeng, Qingsheng

AU - Yin, Xinhua

AU - Wu, Qun

AU - Gao, Lei

AU - Chen, Wan

AU - Wang, Zhefei

AU - Liang, Zhiming

AU - Li, Ao

AU - Ma, Ruyu

PY - 2017/1/18

Y1 - 2017/1/18

N2 - 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.

AB - 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.

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JF - Scientific Reports

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Unidirectional invisibility induced by parity-time symmetric circuit

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