Summary form only given. Optical phased arrays (OPA) represent a versatile device for laser beam steering, adaptive optics, electronic lens, and network switching. An applied stepwise voltage creates a phase grating inside the liquid crystal (LC) media that deflects the incoming laser beam to a programmable angle with high precision and high energy efficiency. LC mixtures with /spl Delta/n/spl ges/0.4 and low viscosity, wide nematic range, low operating voltage and good UV stability are particularly desirable. Tolane liquid crystals exhibit a reasonably high /spl Delta/n, low viscosity, and good chemical, photo and thermal stability. The same properties are also found in isothiocyanates. Therefore, coupling tolane and NCS groups should lead to a high birefringence and large dielectric anisotropy while preserving a relatively low viscosity.
High birefringence liquid crystal mixtures for laser beam steering
The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society ; 2 ; 522-523 vol.2
2002-01-01
102580 byte
Conference paper
Electronic Resource
English
WT2 High Birefringence Liquid Crystals for Laser Beam Steering
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