THz Autocorrelators for ps Pulse Characterization Based on Schottky Diodes and Rectifying Field-Effect Transistors
THz Autocorrelators for ps Pulse Characterization Based on Schottky Diodes and Rectifying Field-Effect Transistors
Preu, S.; Mittendorff, M.; Winnerl, S.; Cojocari, O.; Penirschke, A.
When operating Schottky diodes andr ectifying field-effect transistors in the saturation regime, where they show a sub-
linear response to incident THz power, they can be used as fast autorcorrelators yielding information on the pulse envelope. We report on autocorrelation measurements at 3.41 THz of high-power THz pulses for determination of the pulse duration and pulse structure. By fringe resolved measurements, the THz frequency of the pulse is also obtained. We develop a theoretical model for the rectification process and compare the performance of anantenna-coupled Schottky diode to a large-area field-effecttransistorrectifier. While the Schottky diode saturates earlier and can therefore be used for autocorrelation measurements at lower input power, antenna-less large-area field-effect transistors can be used for highest power levels - even at free electron lasers - and turn out to be very robust.
Keywords: autocorrelator; detector; Schottky diode; field-effect transistor
Involved research facilities
- Radiation Source ELBE DOI: 10.17815/jlsrf-2-58
Related publications
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 22553) publication
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IEEE Transactions on Terahertz Science and Technology 5(2015), 922-929
DOI: 10.1109/TTHZ.2015.2482943
Cited 18 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-22553