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Nonlinear Optical Properties of Low Molecular Organic Glasses Formed by Triphenyl Modified Chromophores

By Andrejs Tokmakovs, Mārtiņš Rutkis, Kaspars Traskovskis, Elmārs Zariņš, Lauma Laipniece, Valdis Kokars and Valdis Kampars


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

Topics: NLO, azochromophore, molecular glasses
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