M. Schnieper et al., Room-temperature persistent spectral hole burning in SrFCl : Sm2+ films: Temporal and spatial response, APPL PHYS L, 75(1), 1999, pp. 40-42
Persistent spectral hole burning was performed on the F-7(0)-D-5(1) transit
ion of Sm2+ in thin films of SrFCl. Depending on the substrate and the grow
th conditions, a total hole depth between 47% and 70% was reached. The hole
s were Lorentzians of width 4(+/-0.3) cm(-1). The time evolution of the hol
e depth was studied. It is described by two exponentials: a short time deca
y (t(1) = 0.37 days) and a long time decay (t(2) = 20.4 days) with a 20% in
finite time limit. One- and two-photon burning mechanisms act. (C) 1999 Ame
rican Institute of Physics. [S0003-6951(99)00327-7].