Ms. Qian Xu Profile

Qian Xu

at Soochow Univ

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Proceedings Article | 18 June 2021 Paper

Fabrication and imaging of liquid crystal-based metalens

Chinhua Wang, Qian Xu

Proceedings Volume 11850, 118500J (2021) https://doi.org/10.1117/12.2599412

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In order to realize high diffraction efficiency and high-quality imaging of liquid crystal-based Pancharatnam-Berry phase (P-B phase) lens at designed wavelength, the polarization holography method is utilized to expose the azo dye molecules and the mixture of liquid crystal molecules. Different from the usual method of spin-coating alignment materials and then spin-coating liquid crystals, this method is voltage tunable which does not require strict control of the spin-coating thickness of the liquid crystal in order to achieve the thickness of the half-wave plate. In addition to the advantages of high resolution and large aperture, the fabrication process of the liquid crystal based lens is greatly simplified. Experimental results show that clear images with diffraction-limited resolution can be obtained, and the diffraction efficiency is greater than 90%. This work provides the possibility for the wide application of P-B phase liquid crystal lenses, especially in the fields of 3-dimensional virtual reality (VR) and augmented reality (AR).

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