Abstract
Herein, we present a practical yet accurate dispersion model for the molecular first hyperpolarizability β. This model incorporates both homogeneous and inhomogeneous line-broadening, because these affect the β dispersion differently, even if indistinguishable in linear absorption. Consequently, combining the absorption spectrum with one free shape-determining parameter Ginhom, the inhomogeneous linewidth, turns out to be necessary and sufficient to obtain a reliable description of the β dispersion, requiring no information on the homogeneous (including vibronic) and inhomogeneous line-broadening mechanisms involved, providing an ideal model for practical use in extrapolating experimental nonlinear optical (NLO) data. The model is successfully applied to extensive wavelength-dependent hyper-Rayleigh scattering (HRS) data of the efficient NLO chromophore picolinium quinodimethane (PQDM).
© 2012 Optical Society of America
PDF ArticleMore Like This
J. Campo, A. Painelli, F. Terenziani, T. Van Regemorter, D. Beljonne, E. Goovaerts, and W. Wenseleers
LT2A.2 Latin America Optics and Photonics Conference (LAOP) 2012
J. Campo, F. Desmet, W. Wenseleers, and E. Goovaerts
LM4A.3 Latin America Optics and Photonics Conference (LAOP) 2012
C. C. Hsu
SaD6 Organic Thin Films (OTF) 1999