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This article is cited in 3 scientific papers (total in 3 papers)
Nonlinear optical phenomena and devices
Nonlinear spectroscopy of photocoloured polytungstic acid nanocomposites
K. V. Yumasheva, A. M. Malyarevicha, N. N. Posnova, I. A. Denisova, M. V. Artem'evb, D. V. Sviridovb, V. P. Mikhailova a International Laser Center, Belarus State Technical University, Minsk
b Research Institute for Physical Chemical Problems of the Belarusian State University, Minsk
Abstract:
Picosecond absorption spectroscopy was used in an investigation of nonlinear optical processes in nanostructured composites based on polytungstic acid, which were photocoloured by preliminary UV irradiation. The absorption bands responsible for the photocoloration and associated with intervalent charge transfer were bleached by the action of powerful laser pulses. The characteristic monoexponential relaxation time of the process was ~300 ps. The results obtained were analysed taking account of the special features of the splitting of the energy levels of tungsten ions with different degrees of oxidation and of delocalisation of the valence states within separate elements of the polytungstic acid structure.
Received: 08.12.1997
Citation:
K. V. Yumashev, A. M. Malyarevich, N. N. Posnov, I. A. Denisov, M. V. Artem'ev, D. V. Sviridov, V. P. Mikhailov, “Nonlinear spectroscopy of photocoloured polytungstic acid nanocomposites”, Kvantovaya Elektronika, 25:8 (1998), 730–734 [Quantum Electron., 28:8 (1998), 710–714]
Linking options:
https://www.mathnet.ru/eng/qe1299 https://www.mathnet.ru/eng/qe/v25/i8/p730
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Abstract page: | 106 | Full-text PDF : | 69 | First page: | 1 |
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