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Ultrafast far-infrared GaAs/AlGaAs photon drag detector in microwave transmission line topology.

Ultraschneller Ferninfrarot GaAs/AlGaAs Photonenschlepp-Detektor in Mikrowellentransmission Linientopologie
: Sigg, H.; Kwakernaak, M.H.; Margotte, A.B.; Erni, D.; Son, P. van; Köhler, K.


Applied Physics Letters 67 (1995), No.19, pp.2827-2829
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IAF ()
III-V Halbleiter; III-V semiconductors; infrared detector; quantum wells

A novel room temperature GaAs/AlGaAs multiquantum-well photon drag detector operating in the 10 mu m wavelength range and designed as a microstrip transmission line has been developed. Total-reflection angle incoupling, using a Ge prism, provides velocity matching between the optical and electrical pulses. Signal transients with 10 ps rise and fall time have been measured using 2 ps pulses from a free electron laser. From the wavelength dependence of the photon drag signal the room temperature momentum relaxation times in the first and second electron subband can be determined.