Theoretical description of photochemical hole burning in soft glasses

Abstract

The temperature dependence of the photochemical hole widths of molecules in soft glasses (Tα, α ≈ 1.3-1.5) is explained by a combination of two dephasing mechanisms. The narrow distribution of two-level systems in such glasses gives rise to one contribution, and the dephasing of localized librational modes by long-wavelength phonons provides a second contribution. We show that in the range T ≤ 25 K, the theoretical temperature dependence agrees with the experiment. © 1983.