Nonlinear Optical Properties of Low Molecular Organic Glasses Formed by Triphenyl Modified Chromophores
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Abstract
The series of organic molecular glasses have been studied as possible candidates for
nonlinear optical (NLO) applications. Amorphous phase formation of investigated materials is
ensured by the presence of bulky triphenyl substituents in molecular structure of NLO
chromophores. Linear optical properties as well as NLO coefficients and thermal stability of
NLO activity for the 13 molecular materials in glassy thin solid films have been determined.
For the benzylidene-1,3-indandione chromophore containing compound the highest d33 value
equal to 280 pm/V was measured under the 1064 nm excitation. Among the investigated
compounds uppermost achieved thermal sustainability of NLO response was 108 °C. The
relationship between number of triphenyl substituents and increased thermal sustainability of
nonlinear response was observed