Essential-states mechanism of optical nonlinearity in. pi. -conjugated polymers

Journal Article · Fri Mar 15 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.6781· OSTI ID:5883543

Dixit, S N ^[1]; Guo, D; Mazumdar, S ^[2]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (USA)
2. Department of Physics, University of Arizona, Tucson, Arizona 85721 (USA)

We present a microscopic mechanism of optical nonlinearity in conjugated polymers. It is shown that the bulk of the nonlinearity is determined by only two well-defined channels, even though an infinite number of channels are possible in principle. We are able to explain the complete frequency dependence of the third-harmonic generation in both {ital trans}-polyacetylene and polydiacetylene within the same model without invoking weak Coulomb interactions between electrons or interchain interactions.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5883543
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:8; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COULOMB FIELD
ELECTRIC FIELDS
FREQUENCY DEPENDENCE
FREQUENCY MIXING
HARMONIC GENERATION
HYDROCARBONS
NONLINEAR OPTICS
OPTICAL PROPERTIES
OPTICS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POLYACETYLENES
POLYENES
POLYMERS