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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2024-91-04-112-122

УДК: 535.342, 535.372, 535.212, 544.228

Cascade excitation of luminescence and second harmonic generation in crystalline powder DAST

Mediantsev E.S., Lobova N.A., Koshkin A.V., Lanin A.A., Ivanov, A.A.

Full text on elibrary.ru

For Russian citation (Opticheskii Zhurnal):

Медянцев Е.С., Лобова Н.А., Кошкин А.В., Ланин А.А., Иванов А.А. Каскадное возбуждение люминесценции и генерация второй гармоники в кристаллическом порошке DAST // Оптический журнал. 2024. Т. 91. № 4. С. 112–122. http://doi.org/10.17586/1023-5086-2024-91-04-112-122

 

Mediantsev E.S., Lobova N.A., Koshkin A.V., Lanin A.A., Ivanov A.A. Cascade excitation of luminescence and second harmonic generation in crystalline powder DAST [in Russian] // Opticheskii Zhurnal. 2024. V. 91. № 4. P. 112–122. http://doi.org/10.17586/1023-5086-2024-91-04-112-122

For citation (Journal of Optical Technology):
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Abstract:

The subject of study is the spectral and nonlinear optical properties of microcrystalline DAST dye powder, spectral properties of DAST dye solutions. The aim of study is the investigation of nonlinear optical properties of microcrystalline DAST dye powder as a promising object for creating new materials, and the analysis of the spectral behavior of the DAST dye in solutions of various natures in order to establish structure-property relationships. Method. The electronic spectra were recorded using spectrophotometry and spectrofluorimetry. The size of the crystal fragment was determined by confocal microscopy. The generation of the second harmonic and excitation of fluorescence in crystalline DAST powder was carried out by femtosecond radiation with a wavelength of 1250 nm in an experimental setup. Main results. The spectral properties of the DAST dye in solvents and microcrystalline powder were investigated. The results on SHG and cascade excitation of luminescence in DAST powder are presented. The luminescence spectrum of the crystalline DAST with an isolated band at a wavelength of 725 nm has been recorded. It is shown that the organic crystals of DAST powder effectively generate the second harmonic under the focusing conditions and parameters of femtosecond radiation at a wavelength of 1250 nm, which are used in microscopy of biological objects and are promising for creating nanosensors and optical elements for converting femtosecond laser radiation with a wavelength of 1250 nm. Practical significance. The DAST dye can be used as nanomarkers in multiphoton microscopy, solution viscosity sensors, as well as optical elements in laser technology and spectroscopy.

Keywords:

organic dye, DAST, nonlinear optical properties, second harmonic generation, femtosecond chromium-forsterite laser, microcrystalline powder, cascade excitation of luminescence

Acknowledgements:

the work was carried out within the State Assignment of the NRC «Kurchatov Institute» in terms of “obtaining microcrystalline dye samples, studying spectral properties, confocal microscopy” and of the Russian Science Foundation (Project № 22-22-00792) regarding the “research of nonlinear optical properties.”

OCIS codes: 190.4710, 180.1790, 300.6280, 300.2530

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