Bipolaron-induced third-order optical nonlinearity in conjugated conducting polymers

Chih Ming Lai, Hsin-Fei Meng

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


A mechanism, due to the presence of bipolarons, for large resonant (Formula presented) in doped cis-polyacetylene and other conjugated conducting polymers is presented. Under optical pumping, the electronic occupations of the two intragap energy levels of the bipolarons will vary, resulting in a shift in their energies, which in turn causes a dramatic change in the absorption spectrum. Even for moderate doping concentrations of bipolarons, (Formula presented) is found to be as high as (Formula presented) esu.

Original languageEnglish
Pages (from-to)16365-16368
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number23
StatePublished - 1 Jan 1996

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