Open AccessBroadband THz detection from 01 to 22 THz with large area field-effect transistors
Author(s) -
Stefan Regensburger,
Martin Mittendorff,
Stephan Winnerl,
Hong Lü,
A. C. Gossard,
Sascha Preu
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.020732
Subject(s) - terahertz radiation , optoelectronics , optics , ultrashort pulse , oscilloscope , broadband , detector , transistor , field effect transistor , materials science , photodetector , responsivity , physics , laser , voltage , quantum mechanics
We report on ultrafast detection of radiation between 100 GHz and 22 THz by field-effect transistors in a large area configuration. With the exception of the Reststrahlenband of GaAs, the spectral coverage of the GaAs-based detectors is more than two orders of magnitude, covering the entire THz range (100 GHz - 10 THz). The temporal resolution of the robust devices is yet limited by the 30 GHz oscilloscope used for read out. The responsivity roll-off towards higher frequencies is weaker than expected from an RC-roll-off model. Terahertz pulses with peak powers of up to 65kW have been recorded without damaging the devices.