NonLinear Optical Spectroscopy of Polymers
Abstract
In linear optical spectroscopy, atomic and molecular structure is probed by light. The intensity, frequencies, and spectral width observed in the signal output from a sample--whether by reflection, transmission, absorption or scattering--reveal clues of energy transitions, and hence information about the electronic, vibrational, and other motional and structural aspects at the molecular level. Typically, the probing photons induce transitions between energy levels characteristic of the sample's molecules. Through analysis of the spectral output, the relative pattern of molecular levels can be reconstructed. Nonlinear optical spectroscopy on the other hand, rather than acting just as a probe, strongly perturbs the system. The strong optical electronic fields reorient the molecule's spatial positions, distort electron clouds, and excite uncharacteristic or forbidden transitions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1989
- Accession Number
- ADA226515
Entities
People
- E. Cavicchi
- J. Kumar
- Sukant Tripathy