УДК: 543.422

Photostimulated modification of the structure and optical properties of a molecular layer of a polymethine dye

Starovoytov, A.A., Razumova, T.K., Kaliteevskaya, E.N., Krutyakova, V.P.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Старовойтов А.А., Разумова Т.К., Калитеевская Е.Н., Крутякова В.П. Фотостимулированная модификация структуры и оптических свойств молекулярного слоя полиметинового красителя // Оптический журнал. 2014. Т. 81. № 5. С. 81–87.

Starovoytov A.A., Razumova T.K., Kaliteevskaya E.N., Krutyakova V.P. Photostimulated modification of the structure and optical properties of a molecular layer of a polymethine dye [in Russian] // Opticheskii Zhurnal. 2014. V. 81. № 5. P. 81–87.

For citation (Journal of Optical Technology):

A. A. Starovoĭtov, T. K. Razumova, E. N. Kaliteevskaya, and V. P. Krutyakova, "Photostimulated modification of the structure and optical properties of a molecular layer of a polymethine dye," Journal of Optical Technology. 81(5), 289-293 (2014). https://doi.org/10.1364/JOT.81.000289

Abstract:

This paper discusses the structural modification of a molecular layer of polymethine dye under the action of laser radiation. Resonance excitation of the all-trans isomer irreversibly alters the spatial orientations and relative concentrations of all the isomeric and aggregated species of the molecules present in the composition of the layer. The influence of the total excitation-energy density on the orientational variation and relative concentrations of the species depends on the lasing regime and the energy density in a single pulse, on the concentration of the all-trans isomer, which determines the amount of absorbed energy in each pulse, and on the total concentration of molecules in the composition of all the species, which affects the heating temperature. A model is proposed for the photostimulated structural modification of a layer of polymethine dye.

Keywords:

spectroscopy, laser, molecular layer, thin film, dimer, J-aggregate

Acknowledgements:

This work was carried out with state financial support of the leading universities of the Russian Federation (Subsidy 074-U01).

OCIS codes: 300.6390

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