Light deflection from ferroelectric domain boundaries
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- Müller, M., Soergel, E., Wengler, M. et al. Appl. Phys. B (2004) 78: 367. doi:10.1007/s00340-003-1374-5
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A new deflection phenomenon of light has been discovered in ferroelectric crystals that provides information about domain structures, their nucleation, and their dynamics: Illumination of a multi-domain crystal with a single light beam yields light patterns, if external electrical fields are applied. Deflection angles of up to ±8° are observed. We attribute this effect to light deflection from the boundaries of the domains. Besides providing a new method to study domains of any ferroelectric material, the method can be of practical importance for electro-optic beam scanning.