abstruct Some experimental results of chiroptical response of single molecule have already reported. In those experiments, dissymmetry parameter, g was used as an indicator of the relative circular dichroism intensity. The parameter for individual molecules was measured. For the purpose of giving an interpretation or explanation to the experimental result, the dissymmetry parameter is formulated on the basis of Fermi's golden rule. Subsequently, the value of individual molecules is evaluated as a function of the direction of light propagation to the orientationary fixed molecules. The ground and excited wavefunction of electrons in the molecule and transition moments needed are culculated using the density functional theory.
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