Excited state absorption of V/sup 2 +/ and Cr/sup 3 +/ ions in crystal hosts. [V/sup 2 +/ in KMgF/sub 3/; Cr/sup 3 +/ in Na/sub 3/Ga/sub 2/Li/sub 3/F/sub 12/ and BeAl/sub 2/O/sub 4/]
We have measured the excited state absorption spectra of KMgF/sub 3/:V/sup 2 +/, Na/sub 3/Ga/sub 2/Li/sub 3/F/sub 12/:Cr/sup 3 +/, and BeAl/sub 2/O/sub 4/:Cr/sup 3 +/. The /sup 4/T/sub 2/ ..-->.. /sup 4/T/sub 1/a, /sup 4/T/sub 1/b transitions were observed for the first two systems, while the /sup 2/E, /sup 2/T/sub 1/ ..-->.. /sup 2/T/sub 2/ transitions were seen for BeAl/sub 2/O/sub 4/:Cr/sup 3 +/. All excited state absorptions, except the /sup 4/T/sub 2/ ..-->.. /sup 4/T/sub 1/a transition, can be understood on the basis of simple crystal field theory. The /sup 4/T/sub 2/ ..-->.. /sup 4/T/sub 1/a transition is found to be profoundly modified by the Jahn-Teller effect, such that it is broader and at higher energy than otherwise expected. This excited state absorption is observed to overlap the emission spectrum of KMgF/sub 3/:V/sup 2 +/, and thereby substantially reduce the effective stimulated emission cross-section.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6182055
- Report Number(s):
- UCRL-96184; CONF-8708116-1; ON: DE87013497
- Resource Relation:
- Conference: 6. international conference on dynamical processes in excited states of solids, Tsukuba, Japan, 11 Aug 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINATES
ABSORPTION SPECTRA
BERYLLIUM COMPOUNDS
CHROMIUM IONS
EXCITED STATES
GALLIUM FLUORIDES
LITHIUM FLUORIDES
MAGNESIUM FLUORIDES
POTASSIUM FLUORIDES
SODIUM FLUORIDES
VANADIUM IONS
CRYSTAL FIELD
DOPED MATERIALS
JAHN-TELLER EFFECT
LASER MATERIALS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
CHARGED PARTICLES
ENERGY LEVELS
FLUORIDES
FLUORINE COMPOUNDS
GALLIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONS
LITHIUM COMPOUNDS
LITHIUM HALIDES
MAGNESIUM COMPOUNDS
MATERIALS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
SPECTRA
400201* - Chemical & Physicochemical Properties