Abstract

Persistent spectral hole burning is essentially a different time two-photon process (burning process by the first photon and observation process by the second one). Various non-radiative phenomena may proceed between each photon process and even within the first one (burning). This makes the phenomena fairly complicated to understand. For instance, the holewidths observed in glass matrices are usually two or three orders of magnitude larger than those (twice of 1/T₂) estimated from the simple phenomenological line shape theory¹⁾. It is considered so far that this is mainly due to the non-equilibrium nature of the disordered matrices.

© 1987 Optical Society of America