Tunable terahertz phase shifter based on dielectric artificial birefringence grating filled with polymer dispersed liquid crystal

doi:10.1364/ome.383058

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	Tunable terahertz phase shifter based on dielectric artificial birefringence grating filled with polymer dispersed liquid crystal
	X. Zhang; F. Fan; C. Y. Zhang; Y. Y. Ji; X. H. Wang and S. J. Chang
	2020
发表期刊	Optical Materials Express
ISSN	2159-3930
卷号	10 期号:2 页码:282-292
摘要	An active terahertz (THz) anisotropic manipulation is based on a structure combined polymer dispersed liquid crystal (PDLC) with sub-wavelength dielectric gradient grating. In this structure, the PDLC works as an adjustable anisotropic material due to the change of the optical axis direction induced by applying a biased electric field, while the dielectric grating serves as an artificial high birefringence material. By using an appropriate design, the THz birefringence of this structure can be enhanced or offset under different biased voltages, and the phase shift curve of this structure becomes flatter than that of the pure PDLC cell due to the dispersion manipulation of the grating. Moreover, the experimental results fit with the simulative designing, demonstrating that the phase shift of the structure can vary from pi to 0 near 0.8 THz when the electric field increases from 0 to 80V, and this device realizes the function of polarization conversion as a tunable THz half-wave plate. This work exhibits potential applications in THz functional devices, such as actively controlled phase shifters and polarization convertors combined LC with artificial microstructure. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI	10.1364/ome.383058
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收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64978
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X. Zhang,F. Fan,C. Y. Zhang,et al. Tunable terahertz phase shifter based on dielectric artificial birefringence grating filled with polymer dispersed liquid crystal[J]. Optical Materials Express,2020,10(2):282-292.
APA	X. Zhang,F. Fan,C. Y. Zhang,Y. Y. Ji,&X. H. Wang and S. J. Chang.(2020).Tunable terahertz phase shifter based on dielectric artificial birefringence grating filled with polymer dispersed liquid crystal.Optical Materials Express,10(2),282-292.
MLA	X. Zhang,et al."Tunable terahertz phase shifter based on dielectric artificial birefringence grating filled with polymer dispersed liquid crystal".Optical Materials Express 10.2(2020):282-292.

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