Abstracts 2002

Abstract of Publication No. 423

Oliver S. Wenger, Hans U. Güdel and Stefan Kück
Excited-state absorption of Cr3+ in Cs2NaScCl6
J. Chem. Phys. 117, 909-913 (2002)      Full Text (PDF)      DOI-Link     

Abstract: Excited-state absorption (ESA) measurements on Cr3+ doped Cs2NaScCl6 in the 6300-17500 cm1 spectral region at 15 K and 300 K are reported. Two ESA bands due to 4T2g 4 T1g(4F) and 4T2g 4 T1g(4P) transitions are observed. The large bandwidth of the t2g2eg-intraconfigurational 4T2g 4T1g(4F) transition at 15 K is rationalized using a single configurational coordinate model involving the eg Jahn-Teller coordinate. At 15 K the effective peak stimulated emission cross section at 10 870 cm1 is about 3.5×1020 cm2, and there is essentially no overlap with ESA at this temperature. At 300 K the ESA cross section is larger than the stimulated emission cross section over the whole range of spontaneous emission.

Last modified: 13.12.11 by Gabriela Frei