Dynamically controlled infrared linear to circular polarizer

Nicholas Sanford

doi:10.1117/12.2633230

26 September 2022 Dynamically controlled infrared linear to circular polarizer

Nicholas Sanford

Proceedings Volume PC12207, Liquid Crystals XXVI; PC122070M (2022) https://doi.org/10.1117/12.2633230
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States

Conference Poster

Abstract

We present two novel multilayer active linear to circular polarizer designs where the sense of the polarization is controlled with a simple AC voltage bias. The designs employ liquid crystal that is electrically biased to control their index of refraction. Layers of periodic lattices deposited on glass carry a bias voltage that changes the delay through the liquid crystal and creates the desired polarization states. The structure is optimized using a multi-objective genetic algorithm approach. The assembly leverages silicon microbeads to maintain the liquid crystal thickness and the metal patterns fabricated using electron beam lithography. The work was performed in support of a DARPA contract.

Citation Download Citation

Nicholas Sanford "Dynamically controlled infrared linear to circular polarizer", Proc. SPIE PC12207, Liquid Crystals XXVI, PC122070M (26 September 2022); https://doi.org/10.1117/12.2633230

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