Abstract

Through directly manipulating spoof plasmonic particles, electronically switchable and tunable bandpass filters have been proposed and experimentally demonstrated in the microwave frequency. The propagation of spoof localized surface plasmons (LSPs) can be controlled by use of double slits in a corrugated ring. The passbands of the filter can be switched on and off by mounting Schottky barrier diodes across the slits. The frequency spectrum of the passbands can be electronically tunable by adjusting the applied bias voltage across the varactor diode. Both simulated and measured results demonstrate dynamic transmission of spoof LSPs in bandpass filters in microwave frequencies. Such electronically controlled devices could find many applications in plasmonic integrated functional circuits.

© 2017 Optical Society of America

Selective amplification of spoof localized surface plasmons

Qiao Yu Li, Xia Zhao, Hong Zhou Zhao, and Yong Jin Zhou
Appl. Opt. 58(36) 9797-9802 (2019)

Bandwidth tunable microstrip band-stop filters based on localized spoof surface plasmons

Bingzheng Xu, Zhuo Li, Liangliang Liu, Jia Xu, Chen Chen, and Changqing Gu
J. Opt. Soc. Am. B 33(7) 1388-1391 (2016)

Spoof localized surface plasmons in corrugated ring structures excited by microstrip line

Bao Jia Yang, Yong Jin Zhou, and Qian Xun Xiao
Opt. Express 23(16) 21434-21442 (2015)

Programmable bandstop filter based on spoof surface plasmon polaritons

Minran Lu, Lihua Xiao, Binggang Xiao, and Jiabin Yu
Appl. Opt. 61(17) 5251-5259 (2022)

Coplanar waveguide wideband band-stop filter based on localized spoof surface plasmons

Zhuo Li, Jia Xu, Chen Chen, Yunhe Sun, Bingzheng Xu, Liangliang Liu, and Changqing Gu
Appl. Opt. 55(36) 10323-10328 (2016)