Journal
OPTICS EXPRESS
Volume 23, Issue 16, Pages 20732-20742Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.020732
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Funding
- Deutsche Forschungsgemeinschaft
- LOEWE research initiative Sensors Towards Terahertz of the state of Hesse/Germany
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We report on ultrafast detection of radiation between 100GHz and 22THz 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 (100GHz - 10THz). The temporal resolution of the robust devices is yet limited by the 30GHz 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. (C) 2015 Optical Society of America
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