Unidirectional invisibility induced by parity-time symmetric circuit

被引：10

作者：

Lv, Bo ^{[1
]}

Fu, Jiahui ^{[1
]}

Wu, Bian ^{[2
]}

Li, Rujiang ^{[3
]}

Zeng, Qingsheng ^{[4
]}

Yin, Xinhua ^{[5
]}

Wu, Qun ^{[1
]}

Gao, Lei ^{[4
]}

Chen, Wan ^{[1
]}

Wang, Zhefei ^{[1
]}

Liang, Zhiming ^{[1
]}

Li, Ao ^{[1
]}

Ma, Ruyu ^{[1
]}

机构：

[1] Harbin Inst Technol, Microwave & Electromagnet Lab, 92 Xidazhi St, Harbin, Heilongjiang Pr, Peoples R China

[2] Xidian Univ, Sch Elect Engn, Xian 710071, Peoples R China

[3] Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Peoples R China

[4] Govt Canada, Propagat Grp, Wireless Technol Branch, Commun Res Ctr Canada, 3701 Carling Ave,Box 11490,Stn H, Ottawa, ON K2H 8S2, Canada

[5] Harbin Med Univ, 157 Baojian St, Harbin, Heilongjiang Pr, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

GAIN;

D O I：

10.1038/srep40575

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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

页数：7

共 31 条

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