Accession Number:

ADA191221

Title:

Time Resolved Spectroscopy Facility for the Study of Nonlinear Optical Properties of Semiconducting Polymers.

Descriptive Note:

Final rept.,

Corporate Author:

CALIFORNIA UNIV SANTA BARBARA INST FORPOLYMERS AND ORGANIC SOLIDS

Personal Author(s):

• Heeger, A. J.

Report Date:

1987-11-13

Pagination or Media Count:

4.0

Abstract:

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.

Descriptors:

• *ACETYLENES
• *OPTICAL PROPERTIES
• *POLYMERS
• *SEMICONDUCTORS
• *SPECTROSCOPY
• *LASER APPLICATIONS
• CHAINS
• ELECTROMAGNETIC SUSCEPTIBILITY
• FACILITIES
• NONLINEAR SYSTEMS
• POWER
• SAMPLING
• THIRD HARMONIC GENERATION
• YAG LASERS
• NEODYMIUM LASERS
• ANISOTROPY
• GROUND STATE

Subject Categories:

• Solid State Physics
• Optics
• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE