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Spatial light modulators and its application in computer generated holograms

Holographic displays have attracted more and more attention in these days, and there is a huge market for relevant products. The research is focused on Optically Addressed Spatial Light Modulators (OASLMs), in comparison to Electrically Addressed Spatial Light Modulators (EASLMs).


Xin Chang


Prof Daping Chu

Project overview

Most popular EASLM device is LCoS, Liquid Crystal on Silicon, which has a far more complicated addressing and driving circuit than an OASLM device. Besides this, OASLMs can provide better resolution and less interference resulting from the dead space of the pixels. However, OASLMs is limited by its physical nature such as the charge carriers diffusion and the electrical fringing field. These phenomenon pose a limit to the resolution. It is also limited by the response time of the photosensitive material. Accordingly, my goal is to achieve higher resolution and faster response speed. I have come up with a few ideas to overcome these issues and it is expected to be improved by the end of the project.

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