Journal
OPTICAL MATERIALS EXPRESS
Volume 5, Issue 2, Pages 265-273Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.5.000265
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- Office of Naval Research [N00014-13-1-0096]
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We report a high birefringence terphenyl liquid crystal mixture, designated as M3, for infrared phase modulation with special emphasis on mid-wave infrared (MWIR). In addition to high birefringence, M3 exhibits excellent UV stability, modest dielectric anisotropy, and a very broad nematic range. The high birefringence enables a thin cell gap to be used for achieving a 2 pi phase change while maintaining a high transmittance (T>98%) in the MWIR region. To achieve fast response time, we employed a polymer network liquid crystal using M3 with 2 pi phase change at lambda= 4 mu m and 3.6-ms response time. This response time is about 100X faster than that of a nematic LC phase modulator. (C) 2015 Optical Society of America
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