Ultrafast Relaxation of Coherent Control Photocurrent in AlGaAs/GaAs Multi Quantum Wells
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Abstract
We theoretically and experimentally study the ultrafast dynamics of coherent control photocurrent in AsGaAs/GaAs multi quantum wells at room temperature. A ballistic photocurrent relaxation time of ~200fs is deduced based on the theory of density matrix and is evidenced with the three-colour femtosecond pump--probe measurements.
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