High-speed analog spatial light modulator using a hydrogenated amorphous silicon photosensor and an electroclinic liquid crystal
- 16 October 1989
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 55 (16) , 1603-1605
- https://doi.org/10.1063/1.102250
Abstract
A high-speed optically addressed spatial light modulator is described which uses the electroclinic effect in chiral smectic A liquid crystals with a p-i-n photodiode of hydrogenated amorphous silicon (a-Si:H). The near microsecond response time is a function of the liquid-crystal mixture and temperature. We present and analyze optical modulation measurements of a device which exhibits a response time of 40 μs at 29 °C and 4 μs at 50 °C. The optical response is continuous and linear with electric field and write-light intensity, allowing for grey level applications.Keywords
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