Design of liquid crystal metalens for achromatic full-color imaging with multiplexed phase coding

Wenhui Cao; Ti Sun; Chinhua Wang

doi:10.1117/12.2686988

6 August 2023 Design of liquid crystal metalens for achromatic full-color imaging with multiplexed phase coding

Wenhui Cao, Ti Sun, Chinhua Wang

Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 127812E (2023) https://doi.org/10.1117/12.2686988
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China

Abstract

Liquid crystals metalens (LC-ML) has attracted much attention due to its powerful functions in shaping light field with planar structure and its great application potentials. However, LC-MLs usually suffer from large chromatic aberration resulting from high phase dispersion. Here, we propose and demonstrate achromatic imaging at red-green-blue (RGB) wavelengths 450 nm, 526 nm, and 630 nm with optimized wavelength multiplexed phase coding in a single liquid crystals metalens. The optimized wavelength multiplexed phase coding, which works on three operating wavelengths simultaneously, is introduced via the complex field of summation of the individual optical fields at selected RGB wavelength and can be achieved via photo-patterning an azo-dye doped LC. The optical efficiency of the fabricated achromatic liquid crystals metalens can be optimized by applying appropriate voltages. The proposed achromatic LC-ML at multi-wavelengths is easy to fabricate and has a potential application in the display field.

Citation Download Citation

Wenhui Cao, Ti Sun, and Chinhua Wang "Design of liquid crystal metalens for achromatic full-color imaging with multiplexed phase coding", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 127812E (6 August 2023); https://doi.org/10.1117/12.2686988

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KEYWORDS

Liquid crystals

Molecules

Polarization

Design and modelling

Image resolution

Multiplexing

Spatial light modulators

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