Phys. Rev. Lett. 92, 047402 (2004) [4 pages]

Phase-Resolved Nonlinear Response of a Two-Dimensional Electron Gas under Femtosecond Intersubband Excitation

Abstract

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C. W. Luo^1,*, K. Reimann^1,†, M. Woerner¹, T. Elsaesser¹, R. Hey², and K. H. Ploog²
¹Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, Germany
²Paul-Drude-Institut für Festkörperelektronik, 10117 Berlin, Germany

Received 7 July 2003; published 30 January 2004

Strong electric-field transients resonant to intersubband transitions in n-type modulation-doped GaAs/AlGaAs quantum wells induce coherent Rabi oscillations, which are demonstrated by a phase-resolved measurement of the light emitted by the sample. The time evolution of the intersubband polarization is influenced by Coulomb-mediated many-body effects. The subpicosecond period and the phase of the Rabi oscillations are controlled by the properties of the midinfrared driving pulse.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.92.047402

DOI:

10.1103/PhysRevLett.92.047402

PACS:

78.67.De, 03.67.–a, 42.65.Re, 73.21.Fg

^*Permanent address: Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, Republic of China.

^†Electronic address: reimann@mbi-berlin.de

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Phys. Rev. Lett. 92, 047402 (2004) [4 pages]

Phase-Resolved Nonlinear Response of a Two-Dimensional Electron Gas under Femtosecond Intersubband Excitation