Title :
Photoelectret characteristics of BaTiO3 single crystal
Author :
Pillai, P.K.C. ; Joseph, Joby ; Singh, K.
Author_Institution :
Dept. of Phys., Indian Inst. of Technol., New Delhi, India
Abstract :
Persistent polarization in single-crystal BaTiO3 was induced by the simultaneous application of a DC field and illumination for a known polarizing time. The magnitude of the polarization and its persistence were found to depend on the strength of the poling field, illumination, and duration of polarization. The dark and photopolarization current decay characteristics of the polarized crystal showed that the polarization persisted for a very long time. Photoelectret of BaTiO3 crystal was used for two-beam coupling and holographic image recording. Considerable image amplifications were obtained when optimum polarization, beam-mixing geometries, and intensity ratios between the reference and object beams were used
Keywords :
barium compounds; dielectric polarisation; holography; photoelectrets; thermally stimulated currents; BaTiO3; beam-mixing geometries; dark decay; holographic image recording; illumination; photoelectret; photopolarization current decay; polarization; poling field; two-beam coupling; Crystals; Four-wave mixing; Holography; Laser beams; Laser excitation; Lighting; Optical coupling; Optical resonators; Polarization; Reflectivity;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167321
