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- W2044452279 abstract "Transient four-wave mixing (FWM) spectra from excitonic Fano resonance (FR) states in biased superlattices are theoretically investigated by numerically solving the semiconductor Bloch equations adopting FR wave functions of the excitonic Wannier-Stark ladder as an expansion basis set. It is found that an Aulter-Townes-like doublet arises from resonant excitation of FR excitons, and shows conspicuous asymmetry in spectrally resolved FWM signals, the degree of which depends strongly upon a Fano-$q$ parameter. Furthermore, the many-body Coulomb exchange effects markedly modify the spectral profiles, so that either lobe of the doublet is considerably narrowed with accompanying reversal of the asymmetry pattern. The effects also shift the overall resonance spectra toward the high-energy side. The three findings of spectral narrowing, asymmetry reversal, and blue shift feature the present dressed FR system. The corresponding time-resolved spectra are also discussed from the viewpoint of the Rabi oscillation." @default.
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- W2044452279 date "2004-01-28" @default.
- W2044452279 modified "2023-10-18" @default.
- W2044452279 title "Asymmetric Autler-Townes-like doublets in laser-driven excitonic Fano resonance in biased superlattices: Role of many-body Coulomb exchange" @default.
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- W2044452279 doi "https://doi.org/10.1103/physrevb.69.035322" @default.
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