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Proceedings Paper

Enigma of the second harmonic generation in oriented film of symmetric squaraine
Author(s): K. Grytsenko; Y. Slominski; O. Tolmachev; R. Resel; S. Ksensov; S. Schrader
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Paper Abstract

Second harmonic generation (SHG) in the oriented film of symmetric squaraine (Sq) was studied. Oriented Sq film on aligned polytetrafluoroethylyne (PTFE) sublayer prepared by vacuum deposition with subsequent rubbing using a cloth has been obtained. However, the mechanisms of orientation and SHG are still not clear. Methyl and ethyl substituted hydroxyl-Sq (OHSq) compounds formed oriented films with dichroic ratio of 8 on PTFE layer but with dichroic ratio of 1,5 on Teflon AF. Second layer deposition of Me-OHSq on Et-OHSq or of Et-OHSq on Me-OHSq led to an increase of the film dichroic ratio. Only the film, where Me-OHSq was first layer, exhibits an increase of SHG signal after deposition of second layer. Small differences in bi-layered OHSq films structure was detected by X-Ray diffraction (XRD) spectra.

Paper Details

Date Published: 16 April 2008
PDF: 8 pages
Proc. SPIE 6999, Organic Optoelectronics and Photonics III, 699920 (16 April 2008); doi: 10.1117/12.780711
Show Author Affiliations
K. Grytsenko, Institute of Semiconductor Physics (Ukraine)
Y. Slominski, Institute of Organic Chemistry (Ukraine)
O. Tolmachev, Institute of Organic Chemistry (Ukraine)
R. Resel, Graz Univ. of Technology (Austria)
S. Ksensov, Univ. of Applied Sciences, Wildau (Germany)
S. Schrader, Univ. of Applied Sciences, Wildau (Germany)

Published in SPIE Proceedings Vol. 6999:
Organic Optoelectronics and Photonics III
Paul L. Heremans; Michele Muccini; Eric A. Meulenkamp, Editor(s)

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