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- Title
Investigation of photo-induced absorption in a Bi<sub>12</sub>TiO<sub>20</sub> crystal.
- Authors
Matusevich, A.; Tolstik, A.; Kisteneva, M.; Shandarov, S.; Matusevich, V.; Kiessling, A.; Kowarschik, R.
- Abstract
A photorefractive Bi12TiO20 (BTO) crystal is exposed with high intensity pulsed-laser beams 532 nm (the average intensity of the laser was 110 mW/cm2, the average intensity per pulse was 2 MW/cm2), and the photo-induced dynamics of the absorption between 480 and 900 nm are studied and explained by two long-lived energy levels in the forbidden band. The relaxation times of the long-lived energy levels are experimentally found to be 104 and 105 s. The hysteresis character of the absorption coefficient is discussed.
- Subjects
LASER beams; ENERGY levels (Quantum mechanics); HYSTERESIS; LIGHT absorption; CRYSTALS
- Publication
Applied Physics B: Lasers & Optics, 2008, Vol 92, Issue 2, p219
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-008-3098-z