Changes in the optical absorption induced in the Bi12TiO20:Al crystal by exposition to short- and long-wavelength radiation

5th International Conference of Photonics and Information Optics

Dyu, V.G.^1 ; Kisteneva, M.G.^1 ; Shandarov, S.M.^1 ; Smirnov, S.V.^1 ; Akrestina, A.S.^1 ; Kargin, Yu F.^2

State University of Control System and Radioelectronics, Lenin Avenue 40, Tomsk

634050, Russia^1

A.A. Baikov Institute of Metallurgy and Materials Science RAS, Moscow

119991, Russia^2

关键词: Impurity absorption;    Lattice relaxation;    Long wavelength;    Meta-stable state;    Photoinduced transition;    Reversible change;    Short wavelengths;    Wavelength radiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/737/1/012018/pdf
DOI  :  10.1088/1742-6596/737/1/012018

来源: IOP

【 摘 要 】

The impurity absorption model is used to describe the experimentally observed reversible changes in the optical absorption spectrum induced in the Bi12TiO20:Al crystal by subsequent exposition to short-wavelength radiation with λi, = 532 nm and longer-wavelength radiation with λn changing from 588 to 1064 nm. The model takes into account the photoinduced transitions between two metastable states of a deep defect center leading to the change of its position in the crystal lattice under conditions of strong lattice relaxation.