Nonlinear Optical Response from Excitons in Soliton Lattice Systems of Doped Conducting Polymers

1995/06/01 by Kikuo Harigaya, Kikuo Harigaya Kikuo Harigaya
Engineering · Materials Science · Physics and Astronomy · #Nonlinear Optical Materials Research #Nonlinear Photonic Systems #Organic Electronics and Photovoltaics #chem-ph #cond-mat #mtrl-th #quant-ph

paper · pdf · doi:10.1143/jjap.36.l556

published as Jap.J.Appl.Phys. 36 (1997) L556-L559 · To be published in Jpn. J. Appl. Phys. (Letters)

arxiv created 1997/04/09 · openalex publication_date 1997/05/01 · arxiv updated 2009/11/30 · openalex created_date 2017/10/20 · openalex updated_date 2026/07/28

Abstract

Exciton effects on conjugated polymers and the resulting optical nonlinearities are investigated in soliton lattice states. We use the Su-Schrieffer-Heeger model with long-range Coulomb interactions for electrons. The third-harmonic generation (THG) at off-resonant frequencies is calculated as functions of the soliton concentration and the chain length of the polymer. The magnitude of the THG with 10 percent doping increases by the factor of about 10² from that of the neutral system. The large increase of the order two is common for several Coulomb interaction strengths, and is seen in open systems as well as in periodic systems.

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