Terahertz flat-top polarization filter based on liquid crystal cavities

Yi Zhou; Juan Zhang; Peiyun Gu

doi:10.1117/12.904705

29 November 2011 Terahertz flat-top polarization filter based on liquid crystal cavities

Yi Zhou, Juan Zhang, Peiyun Gu

Proceedings Volume 8307, Passive Components and Fiber-Based Devices VIII; 830722 (2011) https://doi.org/10.1117/12.904705
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

Abstract

A terahertz (THz) polarization filter based on liquid crystal cavities is designed. The P and S polarized light are both transmitted and the minimum transmittance of P and S polarized light at pass-band is higher than 99.5%.The P polarized light and S polarized light can be both separated distinctly at a small angle. We discuss the influence of each structural parameter on spectral performance, such as rectangle degree, duty cycle, spectral period etc systematically. The results show that the refractive index of the thin-film layers mainly influences the rectangle degrees and duty cycle. The liquid crystal cavities are inversely proportional to the spectral period. The center-frequency tunable characteristics can be realized by changing the incident angle with small angle.

Citation Download Citation

Yi Zhou, Juan Zhang, and Peiyun Gu "Terahertz flat-top polarization filter based on liquid crystal cavities", Proc. SPIE 8307, Passive Components and Fiber-Based Devices VIII, 830722 (29 November 2011); https://doi.org/10.1117/12.904705

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