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This article is cited in 8 scientific papers (total in 8 papers)
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Photonics of laser-excited symmetric cationic polymethine dyes
V. A. Svetlichnyiab, T. N. Kopylovab, G. V. Maiera, I. N. Lapina, N. A. Derevyankoc, A. A. Ishchenkoc a Tomsk State University
b V. D. Kuznetsov Siberian Physicotechnical Institute at Tomsk State University, Tomsk
c Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Kyiv
Abstract:
Efficient lasing is obtained in the visible and near-IR spectral regions in solutions of symmetric polymethine dyes of the indolenine series (indocyanines) pumped by the second harmonic of a Nd3+:YAG laser at 532 nm and an exciplex XeCl* laser at 308 nm into the first (long-wavelength) and higher-lying electronic absorption bands. The quantum lasing efficiency upon UV excitation achieves 37%. It is shown that these dyes can also limit the radiation power of these lasers. Polymethine dyes limit especially efficiently the second-harmonic power, their attenuation factor for the radiation power density of 100 MW cm-2 achieving 14. The nanosecond flash-photolysis study of transient absorption spectra showed that the radiation power is limited by the mechanism of reverse saturated singlet – singlet absorption. It is established that the limiting ability of polymethines strongly depends on their structure.
Received: 23.06.2006
Citation:
V. A. Svetlichnyi, T. N. Kopylova, G. V. Maier, I. N. Lapin, N. A. Derevyanko, A. A. Ishchenko, “Photonics of laser-excited symmetric cationic polymethine dyes”, Kvantovaya Elektronika, 37:2 (2007), 118–123 [Quantum Electron., 37:2 (2007), 118–123]
Linking options:
https://www.mathnet.ru/eng/qe13314 https://www.mathnet.ru/eng/qe/v37/i2/p118
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