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- W2045992105 abstract "Abstract The THG spectrum φ 3 (ω) of trans -polyacetylene has two peaks at 0.6 and 0.9 e V. While the first peak is unanimously understood to originate from the three-photon resonance across the energy gap, how to interpret the second peak is a controversial issue. Both the single-particle and correlated electron theories show that the two-photon resonance can give the second peak, but its position is higher than 0.9 eV . A phenomenological consideration indicates that the excitation-dependent damping shifts the second peak to the lower energy. This paper presents a microscopic theory of the excitation-dependent damping, from which the THG spectrum φ 3 (ω) can be calculated and agrees quantitatively with the experimental data." @default.
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- W2045992105 date "1993-04-01" @default.
- W2045992105 modified "2023-10-02" @default.
- W2045992105 title "Two-photon resonance in THG of polymer" @default.
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- W2045992105 doi "https://doi.org/10.1016/0379-6779(93)90536-6" @default.
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