Nonlinear optical response in doped conjugated polymers

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dc.creatorHarigaya, Kikuo
dc.date1995-07-30
dc.date.accessioned2026-07-07T09:18:03Z
dc.date.available2026-07-07T09:18:03Z
dc.descriptionExciton effects on conjugated polymers are investigated in soliton lattice states. We use the Su-Schrieffer-Heeger model with long-range Coulomb interactions. The Hartree-Fock (HF) approximation and the single-excitation configuration- interaction (single-CI) method are used to obtain optical absorption spectra. 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 at the 10 percent doping increases by the factor about 10^2 from that of the neutral system. This is owing to the accumulation of the oscillator strengths at the lowest exciton with increasing the soliton concentration. The increase by the order two is common for several choices of Coulomb interaction strengths.
dc.descriptionAccepted for publication in J. Phys.: Condens. Matter
dc.identifierhttps://arxiv.org/abs/supr-con/9507007
dc.identifierhttp://arxiv.org/abs/supr-con/9507007
dc.identifierJ. Phys.: Condens. Matter 7 (1995) 7529-7534
dc.identifierdoi:10.1088/0953-8984/7/38/011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/153891
dc.subjectSuperconductivity
dc.subjectChemical Physics
dc.subjectMaterials Science
dc.titleNonlinear optical response in doped conjugated polymers
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