Study of beam-fanning hysteresis in photo- refractive SBN:Ce: light-induced and primary scattering as functions of polar structure |
| |
| Authors: | MY Goulkov T Granzow U Dörfler T Woike M Imlau R Pankrath |
| |
| Institution: | 1.Institute of Physics, National Academy of Sciences of Ukraine, Science Ave 46, 03650 Kiev-39, Ukraine,UA;2.Institut für Mineralogie, Universit?t zu K?ln, Zülpicher Str. 49b, 50674 K?ln, Germany,DE;3.Fachbereich Physik, Universit?t Osnabrück, 49069 Osnabrück, Germany,DE |
| |
| Abstract: | We study light-induced scattering (beam-fanning) in the photorefractive crystal SBN:Ce as a function of the polar structure
of the crystal. The spatial structure of the beam-fanning is measured at different externally applied electric fields, and
an optical hysteresis is found in the scattering. It is shown that the scattering hysteresis results from a polarization hysteresis
typical for ferroelectrics in the polar phase. New information about primary scattering in SBN is obtained, and a corresponding
model of its origin is proposed. It is shown that the intensity and angular distribution of the primary scattering strongly
depend on the polar structure of the crystal and can be affected by the subsequent action of an external field and coherent
illumination.
Received: 27 August 2002 / Revised version: 19 December 2002 / Published online: 26 March 2003
RID="*"
ID="*"Corresponding author. E-mail: mirco.imlau@uni-osnabrueck.de |
| |
| Keywords: | PACS: 42 65 Hw 42 70 Mp 77 80 Dj |
| 本文献已被 SpringerLink 等数据库收录！ |
|
