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Effect of the molecular-dispersed structure of a polar dye solution on its photoluminescence spectra and second harmonic generation in a liquid crystal matrix

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Abstract

The influence of aggregation of polar dye molecules in a nematic liquid crystal (NLC) matrix of 4-p-pentyl-4′-cyanobiphenyl on the formation of a molecular-dispersed ordered system, its photoluminescence spectra, and second harmonic generation (SHG) has been studied. It is established that there is a certain dye concentration in the molecular-dispersed polar dye-NLC system, below which only SHG takes place upon IR (1064 nm) laser excitation. Above this dye concentration, the laser excitation leads to both SHG and an intense two-photon luminescence. A possible mechanism of this phenomenon is proposed.

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Authors and Affiliations

  1. Institute of Physics, National Academy of Sciences of Ukraine, Kiev, Ukraine

    Yu. P. Piryatinskiĭ & M. M. Sevryukova

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  1. Yu. P. Piryatinskiĭ
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  2. M. M. Sevryukova
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Original Russian Text © Yu.P. Piryatinskŭ, M.M. Sevryukova, 2007, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2007, Vol. 33, No. 7, pp. 35–42.

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Piryatinskiĭ, Y.P., Sevryukova, M.M. Effect of the molecular-dispersed structure of a polar dye solution on its photoluminescence spectra and second harmonic generation in a liquid crystal matrix. Tech. Phys. Lett. 33, 288–291 (2007). https://doi.org/10.1134/S1063785007040050

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  • DOI: https://doi.org/10.1134/S1063785007040050

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