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5 January 2004 Device for measuring laser beam intensity
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The giant optical non-linearity of liquid crystals was used to develop a device for measuring intensity of laser beams. The sensitivity of the device was substantially increased by substitution of one of glass substrates of the liquid crystal cell by a photosensitive semiconductor. It is shown that this is due to decreased anchoring energy of LC molecules on the semiconductor surface. The peculiarities of giant optical non-linearity in a liquid crystal cell with one semiconductor substrate are investigated. The discovered regularities allow supposing that the observed decrease in anchoring energy is caused by the semiconductor surface states recharging at light generation.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hakob L. Margaryan, Vladimir M. Aroutiounian, Vachagan A. Meliksetyan, Arsen T. Darbasyan, Artsrun H. Arakelyan, Arman V. Khalaytan, and Nelson V. Tabirian "Device for measuring laser beam intensity", Proc. SPIE 5213, Liquid Crystals VII, (5 January 2004);

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