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Visible and Infrared Absorbers

Photonics.com
Nov 2006
Exciton Inc.Request Info
 
Exciton’s new absorbing dyes, or "absorbers," can provide selective or broadband light filtering through the visible and near infrared. Absorbers with relatively narrow absorption bands filter out infrared light with low visible color, even at high optical densities. They can be used for selective laser wavelength filters and for security applications. Narrowband absorbers can be combined with visible-light absorbing dyes to create sharp-cutoff, long-pass filters.


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GLOSSARY
exciton
A moving, electrically neutral, excited condition of holes and electrons in a crystal. One example is a weakly bound electron-hole pair. When such a pair recombines, with the electron "falling" into the hole, the energy yielded is the bandgap decreased by the binding energy of the pair.
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