Optical control of terahertz nested split-ring resonators

Cai Yuan; Xiao-Lei Zhao; Xiao-Long Cao; Shi-Lin Xu; Nan-Nan Luan; Jian-Quan Yao

doi:10.1117/1.OE.52.8.087111

21 August 2013 Optical control of terahertz nested split-ring resonators

Cai Yuan, Xiao-Lei Zhao, Xiao-Long Cao, Shi-Lin Xu, Nan-Nan Luan, Jian-Quan Yao

Author Affiliations +

Optical Engineering, Vol. 52, Issue 8, 087111 (August 2013). https://doi.org/10.1117/1.OE.52.8.087111

Abstract

Two kinds of optical modulation processes are designed based on nested split-ring resonators in the terahertz regime. By photo-conductivity induced mode switching effect, the resonant structure and resonant mode will be changed, and the two contrary tunable resonant properties are obtained. Without illumination, the two designs both have three resonant peaks. As the intensity of illumination increases, for the first design, the first and the third resonant peaks disappear and a broadband resonant peak at the second resonant frequency is formed eventually; however, the second design realizes an exactly opposite modulation process. Moreover, in order to identify the modulation mechanism, we discuss and analyze the distributions of the electric fields and surface currents in detail. Our designs can be implemented in tunable terahertz functional devices and provide important reference value for the design of terahertz metamaterial.

Citation Download Citation

Cai Yuan, Xiao-Lei Zhao, Xiao-Long Cao, Shi-Lin Xu, Nan-Nan Luan, and Jian-Quan Yao "Optical control of terahertz nested split-ring resonators," Optical Engineering 52(8), 087111 (21 August 2013). https://doi.org/10.1117/1.OE.52.8.087111

Published: 21 August 2013

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