High-performance photorefractive organic glass with near-infrared sensitivity

Ostroverkhova, Oksana; Moerner, W. E.; He, Meng; Twieg, Robert J.
May 2003
Applied Physics Letters;5/26/2003, Vol. 82 Issue 21, p3602
Academic Journal
A high-performance organic glass mixture comprised of two dicyanomethylenedihydrofuran derivatives is presented. A pronounced two-beam coupling effect was observed at a wavelength of 830 nm in an unsensitized composition. Sensitization with (2,4,7-trinitro-9fluorenylidene)malononitrile (TNFM) led to a significant increase in the two-beam coupling gain coefficient, reaching a net value of ∼370 cm[sup -1] at an electric field of 45 V/µm at 1% TNFM, and resulted in an improvement in photorefractive speed.


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