Infoscience

Journal article

Efficient intersubband scattering via carrier-carrier interaction

Using femtosecond resonant luminescence, we have measured the intersubband scattering rate of electrons in wide GaAs quantum wells at very low excitation densities. Even when the spacing be tween the first two electron subbands is smaller than the LO phonon energy, we observe that intersubband scattering is a subpicosecond process, much faster than previously measured or anticipated. Our experimental results are in perfect agreement with Monte Carlo calculations, which show that carrier-carrier interaction is responsible for the ultrafast transitions.

    Keywords: QUANTUM-WELLS ; RELAXATION

    Note:

    Univ oxford, clarendon lab, oxford ox1 3pu, england. Hartig, M, SWISS FED INST TECHNOL, DEPT PHYS, IMO, CH-1015 LAUSANNE, SWITZERLAND.

    ISI Document Delivery No.: YJ654

    Times Cited: 3

    Cited Reference Count: 6

    Cited References:

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    HARTIG M, 1996, PHYS REV B, V54, P14269

    HEYMAN JN, 1995, PHYS REV LETT, V74, P2682

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    THATAM MC, 1989, PHYS REV LETT, V63, P1637

    Reference

    Record created on 2007-08-31, modified on 2016-08-08

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