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Light-induced removal of 180° ferroelectric domains in Rh:BaTiO3

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Abstract

We show that optically-induced photorefractive space-charge fields can remove 180° ferroelectric domains in rhodium-doped barium titanate. The cross section of the domains must be small (less than 100 microns) for this process to occur.

©2000 Optical Society of America

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Supplementary Material (3)

Media 1: MOV (2256 KB)     
Media 2: MOV (2129 KB)     
Media 3: MOV (1515 KB)     

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Figures (4)

Fig. 1.
Fig. 1. Experimental set-up. a) The reference beam enters through the “c” face. b) The reference beam enters through the “a” face.
Fig. 2.
Fig. 2. (2.2MB) Movie of the the decay of domain structure. The domains are visualized using the configuration shown in Fig. 1a. λ=515 nm ; intensity per beam ~20 mW/cm2. Exterior angle between beams: 60°.
Fig. 3.
Fig. 3. (2MB) Tomography of the domain structure after optical poling. The figure on the left shows the position at which the reference beam enters the a-face of the crystal. The figure on the right shows the domain structure of the region sampled by the reference beam.
Fig. 4.
Fig. 4. (1.4MB) Movie of the decay of the domain structure at the exit face of the crystal.
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