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Time Resolved Spectroscopic Investigations of Pure YAIO 3 and Ti‐Doped YAIO 3 Crystals
Author(s) -
Chosrovian H.,
Rentsch S.,
Grummt U.W.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221650234
Subject(s) - excitation , doping , materials science , polaron , absorption (acoustics) , fluorescence , analytical chemistry (journal) , laser , absorption spectroscopy , optics , atomic physics , chemistry , optoelectronics , physics , electron , chromatography , quantum mechanics , composite material
The difference of optical density ΔD(λ, t) after light pulse excitation for Ti doped and pure YAIO 3 crystals is measured within 6, and 1000 ps and 10 μs and 10 s. After laser or flashlamp excitation Ti doped YAIO 3 crystals show a broad light induced transient absorption (LIA) between 350 to 750 nm, which consists of some independent bands. The bands are formed within a few hundreds ps and have about 10 3 to 10 5 times longer lifetimes as the fluorescence of Ti3+ (11 μs). Flashlamp‐spectroscopic investigations in the 10 μs region of both, Ti doped and pure YAIO 3 crystals show a similar spectral and temporal behaviour of absorption differences. In order to explain the experimental results the model of bound small‐polaron is used.