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Two-photon fluorescence measurements of reversible photodegradation in a dye-doped polymer.
The energy dependence suggests that photodegradation is a linear process, while recovery is entropic, which could be useful to high-intensity devices such as two-photon absorbers, which can be used in many applications.
Hardening of polymer optical materials with laser cycling and gamma-rays
When certain molecules are doped into polymers, they are photo-chemically more stable to photodegradation than the same molecule in liquid solution or crystalline form. Furthermore, such composite
Self-Healing and Laser Hardening of Nonlinear-Optical Materials
Phase matching is a necessity, but what happens in the extreme? Can we use the nonlinear processes to create the necessary phase matching?
Self-healing of polymer lasers and two-photon absorbers
This paper reports the photodegradation and recovery of two-photon fluorescence (TPF) in the chromophore AF455 doped in poly(methyl methacrylate) (PMMA) polymer, known to have a large two-photon