Switching terahertz wave with grating-coupled Kretschmann configuration | Zendy

Jiusheng Li | Zendy

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Switching terahertz wave with grating-coupled Kretschmann configuration

Author(s) -

Jiusheng Li

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.019422

Subject(s) - terahertz radiation , optics , refractive index , terahertz spectroscopy and technology , grating , materials science , reflection (computer programming) , extinction ratio , prism , photomixing , optoelectronics , surface plasmon polariton , surface plasmon , far infrared laser , plasmon , physics , laser , terahertz metamaterials , wavelength , computer science , programming language

We present a terahertz wave switch utilizing Kretschmann configuration which consists of high-refractive-index prism-liquid crystal-periodically grooved metal grating. The switching mechanism of the terahertz switch is based on spoof surface plasmon polariton (SSPP) excitation in the attenuated total reflection regime by changing the liquid crystal refractive index. The results highlighted the fact that the feasibility to "tune" the attenuated total reflection terahertz wave intensity by using the external applied bias voltage. The extinction ratio of the terahertz switch reaches 31.48dB. The terahertz switch has good control ability and flexibility, and can be used in potential terahertz free space device systems.

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