Hi everybody.
I would like to know if thre is any material whose fluorescent properties can be changed, in a permanent way, by a external stimulus, in particular by laser irradiation.
For example, let us say that a molecule exposed to UV light emits a blue fluorescence, but after being irradiated by a laser beam, when exposed to UV light its fluorescence shifts to red. It is just a example to explain the idea.
I do not mean laser induced fluorescence, but a permanent change in the fluorescent propoeties characteristcs of the molecule after being exposed to laser.
Thanks a lot in advance.