6 symmetry point group. Under two simultaneously applied external stresses, elastooptic birefringence of a crystal is proportional to the difference between the two external stresses, and the orientations of their birefringent axes are unchanged. When a stress and an electric field are simultaneously and perpendicularly applied to some crystals such as cubic crystals of 43m point group, the field-induced birefringence of the crystal is proportional to the weighted geometric mean of the applied stress and electric field, and the orientations of their birefringent axes only depend on the ratio of the applied electric field and stress. The above electrooptic and elastooptic modulation properties are useful to the design of novel optical modulators and sensors.

"/>     Crystals modulated by two parameters and their applications
Acta Physica Sinica
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Acta Phys. Sin  2014, Vol. 63 Issue (7): 074207     doi:10.7498/aps.63.074207
ELECTROMAGENTISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Current Issue| Archive| Adv Search  |   
Crystals modulated by two parameters and their applications
Li Chang-Sheng
Department of Optoelectronics Engineering, School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China
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