Answers are grounded in this paper and cite their sources.
We report laser-induced permanent darkening in thin films of fluorescein-doped boric acid glass. The photodarkening is accompanied by a substantial increase in the absorption of the irradiated samples. The photoinduced absorption appears to be permanent. Optical and electron paramagnetic resonance measurements suggest the creation of a new photochemical species on irradiation within the absorption band of the fluorescein molecule. A possible mechanism for the photochemical change responsible for the darkening is proposed. Optical storage of information through the formation of permanent holograms is demonstrated.
No takes yet. Share an insight, caveat, or question.
Rao et al. (1996) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: