Time Resolved Spectroscopy Facility for the Study of Nonlinear Optical Properties of Semiconducting Polymers.
CALIFORNIA UNIV SANTA BARBARA INST FORPOLYMERS AND ORGANIC SOLIDS
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We have measured the third order susceptibility associated with frequency tripling the fundamental of a NdYAG laser in various samples of polyacetylene. By measurement of the amount of third harmonic power reflected from a trans-polyacetylene sample relative to that from a sample of intrinsic silicon, we have determined the magnitude of Xv3. all indices parallel to the chain direction to be XII3 9 or - x 10 to the -10th esu. Studies on oriented samples indicate that XII3 dominates all other components of the XII3 tensor, consistent with the large nonlinear susceptibility being due to the conjugated pi-electron backbone. We have also measured third harmonic generations in cis-rich polyacetylene samples.
- Solid State Physics
- Atomic and Molecular Physics and Spectroscopy