Wojcik, Antoni;
Shen, Dezhi;
Selviah, David;
Fernandez, F Anibal;
(2025)
Computer Generated Holograms Using Phase Front Elements for Higher Resolution LCoS Spatial Light Modulators.
Optics Express
, 33
(10)
pp. 20383-20398.
10.1364/oe.565455.
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Abstract
This study presents a concept of a new architecture for liquid crystal on silicon (LCoS) devices for phase modulation with a much-reduced pixel pitch. This is studied here with an example with 2 µm pixel pitch. At this scale, the liquid crystal induces a non-uniform wavefront response across the pixel, varying in both amplitude and phase. To reflect this behavior, we refer to this pixel architecture as phase front elements (PFEs) instead of pixels. To confirm the feasibility of this design, we developed a modification to the Gerchberg-Saxton algorithm to enable Fourier-plane hologram generation. The new algorithm quantizes the complex modulation distributions within the PFEs, thus allowing for projection of target far-field intensity patterns. This work presents a theoretical concept verified in simulations and is intended as a proof-of-concept for such devices.
| Type: | Article |
|---|---|
| Title: | Computer Generated Holograms Using Phase Front Elements for Higher Resolution LCoS Spatial Light Modulators |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1364/oe.565455 |
| Publisher version: | https://doi.org/10.1364/oe.565455 |
| Language: | English |
| Additional information: | Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10208088 |
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