Title :
Ultrafast spectroscopy of a two-dimensional electron gas
Author :
Woerner, M. ; Shih, T. ; Luo, C.W. ; Reimann, K. ; Elsaesser, T. ; Waldmüller, I. ; Knorr, A. ; Hey, R. ; Ploog, K.H.
Author_Institution :
Max-Born-Inst. fur Nichtlineare Optik, Berlin, Germany
Abstract :
Nonlinear transmission measurements of the intersubband resonance on n-type modulation-doped GaAs/AlGaAs multiple quantum wells are presented , which clearly show that for high electron densities radiative coupling becomes the dominant nonlinearity. In contrast, at low electron densities, the quantum wells act almost as uncoupled two-level systems, allowing to observe coherent Rabi oscillations.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; high-speed optical techniques; nonlinear optics; semiconductor quantum wells; two-dimensional electron gas; GaAs-AlGaAs; coherent Rabi oscillations; electron densities; intersubband resonance; n-type modulation-doped GaAs/AlGaAs multiple quantum wells; radiative coupling; two-dimensional electron gas; ultrafast spectroscopy; uncoupled two-level systems; Absorption; Electromagnetic coupling; Electrons; Nonlinear optics; Optical pulse generation; Pulse amplifiers; Pulse measurements; Quantum dots; Quantum mechanics; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics Society, 2004. LEOS 2004. The 17th Annual Meeting of the IEEE
Print_ISBN :
0-7803-8557-8
DOI :
10.1109/LEOS.2004.1363306
