IR SPECTROSCOPY WITH A DOUBLE MODULATION SIDEBAND TECHNIQUE
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Date
1991
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Ohio State University
Abstract
We have applied both microwave and radio frequency modulation to $CO_{2}$ laser lines using only one CdTe modulator. As a result, a grid of closely spaced ($\Delta\nu\times 1 MHz$) and tunable infrared frequencies is generated. This technique was used to perform infrared-infrared double resonance experiments on the molecules $^{28}SiH_{4}$ and $^{28}SiF_{4}$ and to observe the Stark splitting due to extremely small dipole moments. As a preliminary result we obtained values for several dipole moment parameters which agree with measurements performed with other techniques.
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Author Institution: Abteilung Physikalische Chemie, Universit\""{a}t Ulm, Einsteinallee; Laboratoire de Spectronomie, Mol\'{e}culaire et Instrumentation