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Optical Engineering

Design of terahertz narrowband filter based on surface plasmon polaritons of metal–dielectric–metal structure with circular loop arrays
Author(s): Xiang Liu; Dongxiao Yang; Wei Wang; Yinlong Zhao
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Paper Abstract

A narrowband terahertz (THz) filter based on metal–dielectric–metal structure with a circular loop array patterned on metallic films was proposed. The transmission properties in the THz range of the structure were experimentally and theoretically analyzed. The structure’s transmission spectrum has two narrow bands of which band 1 in the lower frequency range was dominated by the transmission mode due to localized plasmon polaritons and band 2 in the higher frequency range was dominated by propagated plasmon polaritons mode and guided mode. Both band 1 and band 2 have high Q-factors. By designing an asymmetry periodic constant in orthogonal directions, band 2 exhibits potentials as a narrowband polarizer. Furthermore, the transmittance of band 2 can be promoted to 100% by laterally shifting the metallic arrays.

Paper Details

Date Published: 29 December 2015
PDF: 5 pages
Opt. Eng. 54(12) 127107 doi: 10.1117/1.OE.54.12.127107
Published in: Optical Engineering Volume 54, Issue 12
Show Author Affiliations
Xiang Liu, Zhejiang Univ. (China)
Dongxiao Yang, Zhejiang Univ. (China)
Wei Wang, Zhejiang Univ. (China)
Yinlong Zhao, Zhejiang Univ. (China)


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