Material that changes transparency when lased from side?

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flux!
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I am into photonics research, and have been searching about this topic in vain, but almost nothing from Google shows up. So i turned here for some light.

Do you guys know any material that changes its transparency when a laser (or light) illuminates from its side?
 
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i have been encountering that, but it isn't a material, it is more of a technique.
 
flux! said:
i have been encountering that, but it isn't a material, it is more of a technique.

"illuminates from one side" is a "technique", no?

If you do not fully explain what you are looking for, especially specific characteristics of what you are looking for, then this is what you will get. If you look at JUST at what you asked in the first post, what I posted fit perfectly. So maybe you need to be a bit more elaborate in what you are seeking for.

Zz.