Resonant optical nonlinearity of conjugated polymers

Ming Che Chang, Hsin Fei Meng

研究成果: 雜誌貢獻文章

摘要

When the energy of a pump wave is in resonance with the exciton creation energy, the electric susceptibility of a conjugated polymer in response to the probe wave is altered by the exciton gas. In this paper we calculate the dependence of this change on the exciton populations by the equation of motion (EOM) method. The magnitude of optical nonlinearity is also influenced by ambient temperature, by the extent of exciton wave functions, and by the strength of electron-electron interaction. All of these factors can be easily incorporated in the EOM approach systematically. Using the material parameters for polydiacetylene, the optical Kerr coefficient (Formula presented) obtained is about (Formula presented) which is close to experimental value, and is four orders of magnitude larger than the value in nonresonant pump experiments.

原文英語
頁(從 - 到)12277-12284
頁數8
期刊Physical Review B - Condensed Matter and Materials Physics
56
發行號19
DOIs
出版狀態已發佈 - 1997 一月 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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