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Proceedings Paper

Multiple up-conversion emissions induced by three-photon absorption from two novel stibazolium-like dyes containing triple conjugated bridge
Author(s): Duo-Yuan Wang; Chuan-Lang Zhan; Yun-Jing Li; Zhen-Zhong Lu; Yu-Xin Nie
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Paper Abstract

Strong three-photon absorption (3PA) and the frequency up- conversion fluorescence induced by 3PA in two novel stilbazolium-like dyes containing triple conjugated bridge have been observed, pumped with 35 ps laser at 1064 nm. The maximum fluorescence peaks are located in the 550, 610 and 700 nm respectively. The emission intensity dependence for the visible emissions on the 1064 nm excitation obeys the cubic law. A local emission (LE) of the donor moiety, excited intramolecular charge transfer state (ICT) and twisted intramolecular charge transfer state (TICT) are response for the multiple fluorescence emissions. The nonlinear transmitted intensity dependence on the laser incident intensity has been demonstrated as a main result referred to three-photon absorption in a 1-cm-path sample quartz cell with solute dissolved in dimethyl sulfoxide (DMSO) at 1064 nm, from which the calculated nonlinear absorption coefficient inferred from three-photon absorption fitted curve are (alpha) 3 equals 4.3 and 3.2 X 10-21 cm3/W2 and the corresponding molecular three-photon absorption cross sections are (sigma) 3 equals 1.9 and 1.6 X 10-76 cm6(DOT)s2, respectively. The optical limiting performances induced by 3 PA have been also performed and discussed for both dyes in DMSO.

Paper Details

Date Published: 16 January 2002
PDF: 9 pages
Proc. SPIE 4462, Nonlinear Optical Transmission Processes and Organic Photorefractive Materials, (16 January 2002); doi: 10.1117/12.452740
Show Author Affiliations
Duo-Yuan Wang, Institute of Chemistry (China)
Chuan-Lang Zhan, Institute of Chemistry (China)
Yun-Jing Li, Institute of Physics (China)
Zhen-Zhong Lu, Institute of Physics (China)
Yu-Xin Nie, Institute of Physics (China)

Published in SPIE Proceedings Vol. 4462:
Nonlinear Optical Transmission Processes and Organic Photorefractive Materials
Christopher M. Lawson; Klaus Meerholz, Editor(s)

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