Terahertz light helicity sensitive photoresponse in GaAs/AlGaAs high electron mobility transistors. The helicity dependent detection mechanism is interpreted as an interference of plasma oscillations in the channel of the field-effect-transistors (generalized Dyakonov-Shur model). The observed helicity dependent photoresponse is by several orders of magnitude higher than any earlier reported one. Also linear polarization sensitive photoresponse was registered by the same transistors. The results provide the basis for a new sensitive, all-electric, room-temperature and fast (better than 1 ns) characterisation of all polarization parameters (Stokes parameters) of terahertz radiation. It paves the way towards terahertz ellipsometry and polarization sensitive imaging based on plasma effects in field-effect-transistors.
@article{arxiv.1204.5649,
title = {Helicity sensitive terahertz radiation detection by field effect transistors},
author = {Christoph Drexler and Nina Dyakonova and Peter Olbrich and Johannes Karch and Michael Schafberger and Krzysztof Karpierz and Yuri Mityagin and Masha Lifshits and Frederic Teppe and Oleg Klimenko and Yahia Meziani and Wojciech Knap and Sergey Ganichev},
journal= {arXiv preprint arXiv:1204.5649},
year = {2015}
}