Essential-states mechanism of optical nonlinearity in -conjugated polymers

S. N. Dixit, Dandan Guo, S. Mazumdar

Research output: Contribution to journalArticlepeer-review

192 Scopus citations


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 trans-polyacetylene and polydiacetylene within the same model without invoking weak Coulomb interactions between electrons or interchain interactions.

Original languageEnglish (US)
Pages (from-to)6781-6784
Number of pages4
JournalPhysical Review B
Issue number8
StatePublished - 1991

ASJC Scopus subject areas

  • Condensed Matter Physics


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