Title :
Femtosecond dynamics of ballistic charge current gratings in GaAs
Author :
Kerachian, Y. ; Marsden, P.A. ; Najmaie, A. ; Sipe, J.E. ; van Driel, H.M. ; Smirl, Arthur L.
Author_Institution :
Dept. of Phys., Toronto Univ., Ont., Canada
Abstract :
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.
Keywords :
III-V semiconductors; ballistic transport; diffraction gratings; gallium arsenide; high-speed optical techniques; quantum interference phenomena; space-charge-limited conduction; 1550 nm; 20 ps to 500 fs; 775 nm; GaAs; ambipolar diffusion; ballistic charge current gratings; femtosecond dynamics; optical injection; quantum interference; relaxation dynamics; space-charge induced transport; Absorption; Diffraction gratings; Frequency; Gallium arsenide; Interference; Laser excitation; Optical pumping; Polarization; Probes; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2005. QELS '05
Print_ISBN :
1-55752-796-2
DOI :
10.1109/QELS.2005.1548884
