Abstract
Although lasing has been observed in the solid state for numerous organic molecules emitting at visible wavelengths, this is few case in the infrared. We show amplified spontaneous emission (ASE) in the near infrared (913-930 nm) from the layer of a cyanine dye-doped 4-cyano-4'-pentylbiphenyl (5CB) for laser power above 0.08 GW/cm2, the layer was prepared with the solution of 1,1',3,3,3',3'- hexamethyl-4,4',5,5'-di-benzo-2,2'-indotricarbocyanine perchlorate (NK-2014) dissolved in 5CB. Oriented NK-2014 molecules in nematic liquid crystal (NLC) must have very high amplified spontaneous emission efficiency.
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