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Proceedings Paper

Effects of dephasing and vibronic structure on the first hyperpolarizability of strong charge transfer molecules
Author(s): Chin Hsien Wang
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Paper Abstract

The dispersion of the first molecular hyperpolarizability (beta) of strongly charge-transfer chromophores is investigated. In the two-photon resonance regime, both dephasing and vibronic and vibronic structure plays an important role in affecting the molecular hyperpolarizability. An equation for (beta) that includes the effect of dephasing and vibrational structure of electronic states is derived. It is shown that, if only the dephasing mechanism is included in the two level model, the intrinsic hyperpolarizability (beta) 0 calculated from the hyper- Rayleigh scattering experimental data using the Oudar-Chemla equation, will decrease with decreasing the excitation wavelength. The trend is reversed when the vibrational structure is also incorporated.

Paper Details

Date Published: 19 May 2000
PDF: 8 pages
Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); doi: 10.1117/12.386377
Show Author Affiliations
Chin Hsien Wang, National Sun Yat-sen Univ. (Taiwan) and Univ. of Nebraska/Lincoln (United States)

Published in SPIE Proceedings Vol. 3939:
Organic Photonic Materials and Devices II
Donal D. C. Bradley; Bernard Kippelen, Editor(s)

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