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تسجيل مستخدم جديدDynamics of Coulomb-correlated electron-hole pairs in disordered semiconductor nanowires
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I. Varga
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The dynamics of optically generated electron-hole pairs is investigated in a disordered semiconductor nanowire. The particle pairs are generated by short laser pulses and their dynamics is followed using the Heisenberg equation of motion. Is is shown that Coulomb-correlation acts against localization in the case of the two-interacting particles (TIP) problem. Furthermore, currents are generated using a coherent combination of full-gap and half-gap pulses. The subsequent application of a full-gap pulse after time $tau$ produces an intraband echo phenomenon $2tau$ time later. The echo current is shown to depend on the mass ratio between the electrons and the holes.
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