Autoresonant control of the many-electron dynamics in nonparabolic quantum wells

Details Autoresonant control of the many-electron dynamics in nonparabolic quantum wells Autoresonant control of the many-electron dynamics in nonparabolic quantum wells

2007-10-05

arxiv.org/abs/0710.1176v1

Appl. Phys. Lett. 91, 061108 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages

Scientific paper

10.1063/1.2761246

The optical response of nonparabolic quantum wells is dominated by a strong peak at the plasmon frequency. When the electrons reach the anharmonic regions, resonant absorption becomes inefficient. This limitation is overcome by using a chirped laser pulse in the autoresonant regime. By direct simulations using the Wigner phase-space approach, the authors prove that, with a sequence of just a few pulses, electrons can be efficiently detrapped from a nonparabolic well. For an array of multiple quantum wells, they can create and control an electronic current by suitably applying an autoresonant laser pulse and a slowly varying dc electric field.

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