Abstract

Photochemical hole burning (PHB) is attracting much interest [1] due to its potential in high density optical memory, and its power in high resolution spectroscopy. The PHB is expected to a 10³ to 10⁴-fold increase in storage density over conventional optical storage. The PHB enables one to select a group of photoreactive molecules in the system, and obtain much information on the circumstances around them. Thermal stability of system at low temperature has been studied extensively with the cycle annealing experiments[2,3]. From these experiments, two types of information can be obtained, i.e. thermal activated backward reaction of photoproduct and spectral diffusion[3]. The systems studied were concentrated on one-color hole burning systems. The information of thermal stability in photon-gated hole burning system is scarce. The laser-induced hole filling were studied in rare earth ion and dyes doped into BaFC1_.5Br_.5 and polymers respectively[2,4,5].

© 1992 Optical Society of America