Journal of Chemical Physics, Vol.117, No.2, 909-913, 2002
Excited-state absorption of Cr3+ in Cs2NaScCl6
Excited-state absorption (ESA) measurements on Cr3+ doped Cs2NaScCl6 in the 6300-17 500 cm(-1) spectral region at 15 K and 300 K are reported. Two ESA bands due to T-4(2g)-->(4) T-1g(F-4) and T-4(2g)-->(4) T-1g(P-4) transitions are observed. The large bandwidth of the t(2g)(2)e(g)-intraconfigurational (4) T-2g-->(4) T-1g(F-4) transition at 15 K is rationalized using a single configurational coordinate model involving the e(g) Jahn-Teller coordinate. At 15 K the effective peak stimulated emission cross section at 10 870 cm(-1) is about 3.5x10(-20) cm(2), 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.