Difference between revisions of "Two-photon cross section"
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:<math>\sigma(\omega) \propto Im [\gamma(-\omega; \omega, \omega, - \omega)]\,\!</math> | :<math>\sigma(\omega) \propto Im [\gamma(-\omega; \omega, \omega, - \omega)]\,\!</math> | ||
The bulk TPA coefficient is often represented by β, not to be confused with the first hyperpolarizability. | |||
Latest revision as of 16:46, 4 January 2010
The molecular cross-section for two photon absorptions is proportional to the imaginary part of γ
- <math>\sigma(\omega) \propto Im [\gamma(-\omega; \omega, \omega, - \omega)]\,\!</math>
The bulk TPA coefficient is often represented by β, not to be confused with the first hyperpolarizability.