Abstract
We have evaluated the optical limiting properties of transparent organic crystals and nanocrystals in an f/5 optical system. We have studied three organic or organic–inorganic crystals and a sol–gel glass which contains organic nanocrystals of stilbene3. The spectral dependence of the optical limiting curves have shown that broadband limitation can be achieved in the visible range with the 2-amino-5-nitropyridinium-dihydrogenphosphate (2A5NPDP) crystal as the transmitted energy is less than 10 μJ over a wide spectral range (450–600 nm). Results on nanocrystals have indicated that these new materials are a suitable alternative to crystals due to their isotropic response with polarization.
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