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Photon drag spectroscopy of a two-dimensional electron system

Photonen-Schlepp-Spektroskopie eines zweidimensionalen Elektronensystems
: Sigg, H.; Son, P. van; Köhler, K.


Surface Science 361/362 (1996), S.468-471
ISSN: 0039-6028
Fraunhofer IAF ()
heterostructure; Heterostruktur; III-V Halbleiter; III-V semiconductors; quantum wells

The photon drag effect in a two-dimensional electron gas of a GaAs/AlGaAs multi-quantum well system is measured using the ps infrared pulses of the wavelength-tunable free electron laser source FELIX. The temporal response of the sample on a ps timescale has been verified, and the continuous spectral response through the intersubband resonance is investigated for low and high intensities at room temperature and at T=100 K. An analysis of the lineshape yields information about the momentum relaxation times of the electrons in the ground and excited subbands.