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Optical switching in a superconductor-semiconductor-superconductor Josephson junction

Optisches Schalten in einem Supraleiter-Halbleiter-Supraleiter-Übergang
: Bastian, G.; Göbel, E.O.; Schmitz, J.; Walther, M.; Wagner, J.


Applied Physics Letters 75 (1999), No.1, pp.94-96
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IAF ()
InAs/AlSb/GaSb; Josephson-Bauelement; Josephson junction; superconductivity; Supraleitung

We have fabricated Josephson junctions with a two-dimensional electron gas based on InAs/AlSb/GaSb as the barrier. The behavior of the junction during and after illumination with different wavelengths was studied. Due to a persistent positive and negative photoeffect, depending on the excitation wavelength, the carrier density and hence the critical current as well as the normal resistance could be switched between two different stable states.