Abstract

In the past spectral hole burning was intensively investigated for dye molecules in solid matrices. The long-lived photochemical holes at low temperature gave valuable and detailed information on the structural properties of the molecular surrounding, e.g. polymer matrices. More recently, persistent photochemical hole burning at low temperatures was extended to the infrared for smaller molecules in rare gas¹ or glass matrices and to hydrogen bonded polymers.²

© 1991 Optical Society of America