Investigation of photo-induced absorption in a Bi12TiO20 crystal
| Autor: | Alexei L. Tolstik, Stanislav M. Shandarov, V. Matusevich, M. G. Kisteneva, Richard Kowarschik, A. Matusevich, Armin Kiessling |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) business.industry Relaxation (NMR) General Engineering General Physics and Astronomy Photorefractive effect Laser Intensity (physics) law.invention Crystal Hysteresis Optics law Attenuation coefficient Atomic physics business Absorption (electromagnetic radiation) |
| Zdroj: | Applied Physics B. 92:219-224 |
| ISSN: | 1432-0649 0946-2171 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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