Research on terahertz liquid crystal focusing modulators

Yanchun Shen; Zhenhua Xu; Xiaoming Li; Ximing Qiao; Qiaolian Wang

doi:10.1117/12.3025099

8 February 2024 Research on terahertz liquid crystal focusing modulators

Yanchun Shen, Zhenhua Xu, Xiaoming Li, Ximing Qiao, Qiaolian Wang

Proceedings Volume 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023); 130660H (2024) https://doi.org/10.1117/12.3025099
Event: 2023 International Conference on Optoelectronic Materials and Devices (COMD 2023), 2023, Chongqing, China

Abstract

In recent years, devices replicating the modulating effect of lenses have emerged, some based on principles of diffraction, phase change, or metallic resonance. With the advent of metasurfaces, devices have been created that use sub-wavelength microstructures based on the generalized Snell's law to achieve continuous phase change and thus manipulate the THz wavefront. In this paper, we endeavor to utilize liquid crystals, based on the generalized Snell's law, designing a terahertz modulating element working on geometric phase, enabling it to function like a terahertz lens. The experimental results confirmed that our THz liquid crystal lens, designed based on geometric phase and stemming from the generalized Snell's law, possesses sufficient modulation effect, demonstrating the feasibility of liquid crystal modulation in the THz frequency range.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yanchun Shen, Zhenhua Xu, Xiaoming Li, Ximing Qiao, and Qiaolian Wang "Research on terahertz liquid crystal focusing modulators", Proc. SPIE 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023), 130660H (8 February 2024); https://doi.org/10.1117/12.3025099

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