Prediction and Observation of the Nonlinear Stark Effect in the ν3 Band of SiF4

Abstract

The dipole moment parameters μ0 and μ33 of SiF4 have been determined previously from linear Stark effect observations on E-type transitions. These dipole moment parameters have been used to predict the nonlinear Stark effect which arises from interactions between A1/A2, F1/F2, and E/E energy levels. Both the frequency and intensity of the Stark saturation spectra of selected transitions of the ν3 fundamental have been measured using the infrared sideband technique. It has been shown that the observed M structure agrees with the prediction within the error limits of the dipole moment parameters.