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"Triggering" effect of second harmonic generation in centrosymmetric alpha-BaB2O4 crystals
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SYSNO ASEP 0343179 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title "Triggering" effect of second harmonic generation in centrosymmetric alpha-BaB2O4 crystals Author(s) Adamiv, V. T. (UA)
Ebothe, J. (FR)
Piasecki, M. (PL)
Burak, Y. V. (UA)
Teslyuk, I. M. (UA)
Plucinski, K.J. (PL)
Reshak, Ali H (UEK-B)
Kityk, I. V. (PL)Number of authors 8 Source Title Optical Materials. - : Elsevier - ISSN 0925-3467
Roč. 31, č. 4 (2009), s. 685-687Number of pages 3 s. Language eng - English Country NL - Netherlands Keywords optical materials ; borates Subject RIV BO - Biophysics CEZ AV0Z60870520 - UEK-B (2005-2011) UT WOS 000263632400017 DOI 10.1016/j.optmat.2008.07.012 Annotation We have discovered an occurrence of optical second harmonic generation at 1064 nm fundamental wavelength for the alpha-BaB2O4 (ABO) crystal illuminated by 7 ns nanosecond nitrogen laser of 337 nm. The effect is observed only during illumination and achieves the maximum SHG output after 15-20 min of treatment. After switching off of the UV laser treatment the SHG decreases during about 5 min. The maximum second order susceptibility achieved was equal to about 2.1 pm/V at 1064 min after about 20 min of UV laser treatment. The observed SHG is explained by local photothermal heating of the crystals and photo stimulated photothermal anisotropy that favors an occurrence non-centrosymmetry of the local charge density. An additional investigations of the low-power (cw) He-Ne laser light indicate the absence of additional light scattering, which unambiguously indicates an absence of any additional microcrystalline states including non-cenrosymmetrical beta-BaB2O4 phases. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2011
Number of the records: 1