Abstract
Single crystals of SbSI have shown large changes in refractive index through the paraelectric–ferroelectric transition for light polarized parallel to the ferroelectric c axis. Near the absorption edge, the observed change is discontinuous. Large changes in refractive index can also be induced by pulsed electric fields along the c axis. The extreme anisotropy of SbSI is indicated by the large partial birefringences observed in the paraelectric phase.
© 1967 Optical Society of America
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