A Submicron Metal Grid Mirror Liquid Crystal Light Valve For Optical Processing Applications

U. Efron; A. Au; C. S. Bak; N. W. Goodwin; P. G. Reif; H. L. Garvin; W. Byles; Y. Owechko; M. S. Welkowsky

doi:10.1117/12.962259

5 February 1990 A Submicron Metal Grid Mirror Liquid Crystal Light Valve For Optical Processing Applications

U. Efron, A. Au, C. S. Bak, N. W. Goodwin, P. G. Reif, H. L. Garvin, W. Byles, Y. Owechko, M. S. Welkowsky

Proceedings Volume 1151, Optical Information Processing Systems and Architectures; (1990) https://doi.org/10.1117/12.962259
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

A submicron metal grid mirror was incorporated into the structure of a silicon liquid light valve. In our experiment, a 0.5 μm-period, aluminum wire grid mirror was used in conjunction with a 90°-twisted nematic configuration. A sharp threshold with a peak-to-threshold ratio of 3:1 was experimentally observed. The threshold intensity level was tunable from 2.5 μW/cm² to 50 μW/cm² by changing the bias voltage from about 5 to 25 volts. These properties allow the polarization-sensitive mirror-based LCLV to be used as a non-linear SLM with applications in optical computing (bistable device) and adaptive image thresholding. The device can also be used as an interfacing device for an optical co-processor as well as for optical implementation of Hopfield-Anderson association and phase conjugation.

Citation Download Citation

U. Efron, A. Au, C. S. Bak, N. W. Goodwin, P. G. Reif, H. L. Garvin, W. Byles, Y. Owechko, and M. S. Welkowsky "A Submicron Metal Grid Mirror Liquid Crystal Light Valve For Optical Processing Applications", Proc. SPIE 1151, Optical Information Processing Systems and Architectures, (5 February 1990); https://doi.org/10.1117/12.962259

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