Two nonlinear optical experiments are presented in which the third-order
electronic susceptibility of molecules is used to generate Raman signals. The first
one uses a single 532 nm beam from a Nd:YAG laser to produce Stimulated Raman
Scattering in benzene and deuterated benzene. With a simple experimental set-up,
stimulated emission involving CC and CH (CD) stretching modes from both C���H���
and C���D��� can be visually witnessed. Collinear and conical stimulated Raman beams
are observed and explained. Measuring the wavelengths of the coherent beams with
a meter stick and a grating permits the calculation of CC and CH force constants in
benzene. This experiment has been developed as a lab in graduate and
undergraduate courses and has been submitted to J. Chem. Ed. for publication.
The second experiment uses a high resolution Coherent Anti-Stokes
spectrometer to investigate the v��� vibrational mode of the CD��� radical produced by
photolysis of CD���I. Calibrated spectra are obtained at much higher resolution than
in an earlier published study and efforts are described to improve the range of data
and to reconcile differences between the spectra. Modeling of the spectra leads to a
"best fit" set of vibration-rotation parameters for CD��� but a completely satisfactory
fit of both high and low resolution spectra was not achieved. / Graduation date: 2003
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/32064 |
| Date | 04 September 2002 |
| Creators | Melin, St��phanie |
| Contributors | Nibler, Joseph W. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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