Chiral liquid crystal-based concave holographic spectrometer on a curved substrate

Rohan Sharma; Brecht Berteloot; Inge Nys; Kristiaan Neyts

doi:10.1117/12.3022311

18 June 2024 Chiral liquid crystal-based concave holographic spectrometer on a curved substrate

Rohan Sharma, Brecht Berteloot, Inge Nys, Kristiaan Neyts

Proceedings Volume PC13016, Liquid Crystals Optics and Photonic Devices; PC130160U (2024) https://doi.org/10.1117/12.3022311
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

A spectrometer performs two optical functions: chromatic dispersion and imaging onto a sensor. These two optical functionalities can be combined in a single device consisting of chiral nematic liquid crystals (CLC) deposited onto a curved substrate. To anchor the liquid crystal, we use the photo-alignment technique which involves interference of two beams onto a photosensitive layer. The resulting interference pattern generates a linear diffraction grating. Through ray-tracing simulations, the layout of the spectrometry setup is optimised for minimum astigmatism. We experimentally demonstrate the prototyping of a compact spectrometer based on holographically aligned chiral liquid crystals onto a curved substrate.

Citation Download Citation

Rohan Sharma, Brecht Berteloot, Inge Nys, and Kristiaan Neyts "Chiral liquid crystal-based concave holographic spectrometer on a curved substrate", Proc. SPIE PC13016, Liquid Crystals Optics and Photonic Devices, PC130160U (18 June 2024); https://doi.org/10.1117/12.3022311

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