Review of terahertz phase control devices based on liquid crystal integrated with microstructures or nanomaterials

Yunyun Ji; Fei Fan; Shengjiang Chang

doi:10.1117/12.2604033

9 September 2021 Review of terahertz phase control devices based on liquid crystal integrated with microstructures or nanomaterials

Yunyun Ji, Fei Fan, Shengjiang Chang

Author Affiliations +

Proceedings Volume 11909, Tenth International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2021); 119090A (2021) https://doi.org/10.1117/12.2604033
Event: Tenth International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2021), 2021, Chengdu, China

Abstract

Phase and polarization are the basic parameters of electromagnetic wave, which can not only carry useful electromagnetic information, but also manipulate the propagation and states of light. With the development of terahertz (THz) technology and its application system, high-performance THz phase control devices are urgently needed. Our recent research work on THz phase control devices based on liquid crystals integrating with artificial microstructures or nanomaterials was reviewed in this paper. The proposed dielectric metasurface can realize a polarization-dependent electromagnetically induced transparency effect with a large artificial birefringence and a negative-dispersion phase difference with large artificial anisotropy. The double-layer graphene gratings can achieve a switchable function to switch between linear-to-linear and linear-to-circular polarization states. On this basis, we presented to combine the artificial microstructures with liquid crystals for controllable THz phase shifters and broadband wave plates. Moreover, by using the strong interaction between liquid crystals and the electrically or magnetically sensitive nanomaterials, we proposed a series of high-efficiency control THz phase devices. This work has greatly promoted the development and practical application of THz phase and polarization control devices.

Citation Download Citation

Yunyun Ji, Fei Fan, and Shengjiang Chang "Review of terahertz phase control devices based on liquid crystal integrated with microstructures or nanomaterials", Proc. SPIE 11909, Tenth International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2021), 119090A (9 September 2021); https://doi.org/10.1117/12.2604033

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