Femtosecond dynamics of ballistic charge current gratings in GaAs

We investigate the dynamics of ballistic charge currents, optically-injected into GaAs by quantum interference of 1550 and 775 nm, 150 fs pulses. Space-charge induced transport and ambipolar diffusion successively define the relaxation dynamics on a 500 fs-20 ps timescale.

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Bibliographic Details
Published in2005 Quantum Electronics and Laser Science Conference Vol. 1; pp. 649 - 651 Vol. 1
Main Authors Kerachian, Y., Marsden, P.A., Najmaie, A., Sipe, J.E., van Driel, H.M., Smirl, A.L.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2005
Subjects
Absorption
Diffraction gratings
Frequency
Gallium arsenide
Interference
Laser excitation
Optical pumping
Polarization
Probes
Ultrafast optics
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Summary:We investigate the dynamics of ballistic charge currents, optically-injected into GaAs by quantum interference of 1550 and 775 nm, 150 fs pulses. Space-charge induced transport and ambipolar diffusion successively define the relaxation dynamics on a 500 fs-20 ps timescale.
ISBN:1557527962
9781557527967
DOI:10.1109/QELS.2005.1548884