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Proceedings Paper

Lasing of 2D short-range photonic crystals made of dyed vesicular polymer
Author(s): Vasil P. Yashchuk; E. Tikhonov; O. Prygodiuk; V. Koreniuk; L. Paskal
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Paper Abstract

The random lasing of R6G-dyed vesicular polymeric films was investigated. The short-range ordering of vesicles allows classifying the films as 2D short-range photonic crystals. Nevertheless the ordering causes neither resonant nor interference conditions in this medium but the films reveal good lasing parameters: low lasing threshold and high luminescence-to-lasing transition rate. The obtained lasing spectra reveal quasi-linear structure when pump intensity is considerably above the lasing threshold and the dye concentration is over2*10-3M/l. All spectral lines are good reproducible from shot to shot. The dye concentration as well as pump intensity do not influence the frequencies of spectral lines. In the absence of any resonant conditions, we discuss the latent vibronic structure of the fluorescence spectrum and Raman scattering revealing as the most probable reasons for the random lasing spectrum structure. The Raman and vibronic frequencies are compared with the observed lasing spectrum lines. Good correlation between the lasing and Raman frequencies is shown. The mechanism of the quasi-linear lasing spectrum formation by amplification of the combined radiation of resonant Raman scattering and luminescence up to saturation is proposed. The random lasing spectrum in diffusive regime is denoted to provide a new way of laser dye Raman scattering investigation.

Paper Details

Date Published: 31 July 2007
PDF: 7 pages
Proc. SPIE 6728, ICONO 2007: Novel Photonics Materials; Optics and Optical Diagnostics of Nanostructures, 67280N (31 July 2007); doi: 10.1117/12.752181
Show Author Affiliations
Vasil P. Yashchuk, National Taras Shevchenko Univ. of Kyiv (Ukraine)
E. Tikhonov, Institute for Physics of Ukraine (Ukraine)
O. Prygodiuk, National Taras Shevchenko Univ. of Kyiv (Ukraine)
V. Koreniuk, National Taras Shevchenko Univ. of Kyiv (Ukraine)
L. Paskal, National Taras Shevchenko Univ. of Kyiv (Ukraine)


Published in SPIE Proceedings Vol. 6728:
ICONO 2007: Novel Photonics Materials; Optics and Optical Diagnostics of Nanostructures

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