Some aspects of the excited state absorption spectroscopy of doped ions in crystals

B. K. Sevastyanov

doi:10.1117/12.229163

3 January 1996 Some aspects of the excited state absorption spectroscopy of doped ions in crystals

B. K. Sevastyanov

Proceedings Volume 2706, Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions; (1996) https://doi.org/10.1117/12.229163
Event: Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare Earth and Transitional Ions, 1995, St. Petersburg, Russian Federation

Abstract

Possibilities of the excited state absorption (ESA) spectroscopy as the method for investigation of two physical phenomena are discussed. The first is charge transfer (ChT) process in doped ionic crystals. The second is the study of phonon spectra of doped ionic crystals by measuring narrow non-phonon lines (I-lines) in ESA spectra. ChT bands can be measured much more easily in ESA than in ground state absorption (GSA) spectra. Temperature dependence of ChT bands of Cr³⁺ ion doped crystals suggests that ChT process is mainly of a donor nature e.g., [(3d yields 4s) or 3d yields (oxygen orbital)]. ChT band positions of Ti³⁺:Al₂O₃ and Cr³⁺:Li₂Ge₇O₁₅ crystals measured by ESA spectroscopy and two-step photoionization methods are approximately the same. Phonon repetitions of I-lines in the ESA spectra of doped crystals are in very good agreement with phonon spectra of crystal hosts. It allows us to assume the ESA spectroscopy as a method for determination of phonon spectra of doped ionic crystals.

Citation Download Citation

B. K. Sevastyanov "Some aspects of the excited state absorption spectroscopy of doped ions in crystals", Proc. SPIE 2706, Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions, (3 January 1996); https://doi.org/10.1117/12.229163

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