New shape of inhomogeneously broadened resonance lines in semi-infinite media: Sm2+ luminescence in CaF2/Si(111) thin films
Averkiev N. S., Vikhnin V. S., Sokolov N. S., Yakovlev N. L.
The inhomogeneous broadening of resonance lines by the elastic fields of dilatation centers in a semi-infinite medium is analyzed in the case in which the elastic defects and the probes are distributed in a narrow surface layer (in a thin film). The new shape of the resonance line is derived theoretically. The theory provides an interpretation of experiments on the luminescence of Sm2 + in CaF2/Si (111) thin films.