Abstract
Nonlinear optical processes in liquid crystals have attracted strong attention because of large nonlinear susceptibilities χ(3) in the nematic mesophase and the isotropic phase.1 These nonlinearities are approximately independent of wavelength over the entire visible and near-IR region in contrast to other materials with large nonlinearities.2 In nematics unusually large effects based on optical field-induced molecular reorientation have been observed by using low power cw laser beams,3 but reorientation will also occur if short nanosecond laser pulses are used.4
© 1989 Optical Society of America
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