Abstract

Persistent spectral holes have been shown to be very effective probes for studying various optical properties of solids [1]. Spectral hole-burning (SHB) studies include, in principal, two different types of experiments. In type I experiments the physical conditions (temperature, pressure, electric or magnetic fields etc.) are varied between the burning and measuring procedures. Such experiments yield information mostly on the shifts of energy levels (transition energy changes) of impurity molecules embedded in various matrices. Starting with the pioneering studies by Haarer et al. [2] a lot of interesting results were obtained on the influence of pressure (both uniaxial and hydrostatic) on the spectral holes in type I (nonisobaric) experiments in the low-pressure range (<200 bar).

© 1992 Optical Society of America