A general theory of inhomogeneous broadening for nonlinear susceptibilities: the second hyperpolarizability

Details A general theory of inhomogeneous broadening for nonlinear susceptibilities: the second hyperpolarizability A general theory of inhomogeneous broadening for nonlinear susceptibilities: the second hyperpolarizability

2008-02-23

arxiv.org/abs/0802.3421v1

Physics

Optics

Submitted to IEEE JSTQE

Scientific paper

A general theory of inhomogeneous broadening is rarely applied to nonlinear spectroscopy in lieu of either a simple Lorentzian or Gaussian model. In this work, we generalize all the important third-order nonlinear susceptibility expressions obtained with sum-over state quantum calculations to include Gaussian and stretched Gaussian distributions of Lorentzians. This theory gives a better fit to subtle spectral features - such as the shoulder of the electroabsorption peak, and is a more accurate tool for determining transition moments from spectroscopy experiments.

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