The dispersive kinetics of nonphotochemical burning and spontaneous filling of the zero-phonon hole of Cresyl Violet in polyvinyl alcohol at 1.6 K are analyzed in terms of the standard external two-level system (TLSezt) model for probe–glass systems and a distribution function for the tunnel frequency derived from a normal distribution function for the tunnel parameter λ. Average values for the relaxation rates for burning and filling are determined. It is shown that the dominant mechanism for filling is not global spectral diffusion but rather antihole reversion. A high degree of positive correlation between the rates of burning and filling associated with the TLSext is found. A new methodology that permits a more physically reasonable interpretation of spontaneous hole-filling kinetics is described. It is based on the hypothesis that only a fraction of burned sites, on reversion to the ground state, yield sites with resonance frequencies that lie within the hole profile.
© 1992 Optical Society of America
Original Manuscript: November 5, 1991
Published: May 1, 1992
Luchuan Shu and Gerald J. Small, "Dispersive kinetics of nonphotochemical hole burning and spontaneous hole filling: Cresyl Violet in polyvinyl films," J. Opt. Soc. Am. B 9, 733-737 (1992)