Photoconductive switches for time-resolved transport measurements at low temperatures and high magnetic fields

authored by

G. Ernst, R. J. Haug, M. Klingenstein, J. Kuhl, K. Von Klitzing, K. Eberl

Abstract

Metal-semiconductor-metal photodiodes were optimized as pulse generators for time-resolved electrical measurements at low temperatures and high magnetic fields, using a laser diode as the light source. For the photoconductor, a heterostructure consisting of high-quality GaAs and low-temperature grown GaAs was used. The dependence of the photocurrent pulses on the applied magnetic field was determined. A two-dimensional electron gas in a magnetic field served as the device under test for the time-resolved measurements. We observed a splitting of the incident pulse into two transmitted pulses resulting from modal dispersion in the two-dimensional electron gas.

External Organisation(s)

Max Planck Institute for Solid State Research (MPI-FKF)

Type

Article

Journal

Applied physics letters

Volume

68

Pages

3752-3754

No. of pages

3

ISSN

0003-6951

Publication date

01.12.1996

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Electronic version(s)

https://doi.org/10.1063/1.115995 (Access: Unknown)