Ultrafast control of electronic motion in semiconductor nano and mesoscopic structures

Alex Matos Abiague; Jamal Berakdar

doi:10.1117/12.582901

13 April 2005 Ultrafast control of electronic motion in semiconductor nano and mesoscopic structures (Invited Paper)

Alex Matos Abiague, Jamal Berakdar

Proceedings Volume 5725, Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX; (2005) https://doi.org/10.1117/12.582901
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

We study the charge dynamics in a double quantum well and in ballistic mesoscopic rings driven by half-cycle pulses. It is shown that such pulses can be utilized to localize, within femtoseconds, and control, for picoseconds, the electronic motion in a Ga_1-xAl_xAs based double quantum well. To identify the pulse parameters that appropriate for an efficient control process we developed a simplified analytical model and corroborated the results by performing full numerical calculations. We also show that when a thin ballistic mesoscopic ring is subjected to a linearly polarized HCP a post-pulse (and therefore field-free) polarization is induced in the ring. The non-equilibrium post-pulse polarization oscillates in the ring as long as the coherence is preserved and decays on a time scale determined by the relaxation time.

Citation Download Citation

Alex Matos Abiague and Jamal Berakdar "Ultrafast control of electronic motion in semiconductor nano and mesoscopic structures (Invited Paper)", Proc. SPIE 5725, Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX, (13 April 2005); https://doi.org/10.1117/12.582901

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