Terahertz Plasmonic Detector Controlled by Phase Asymmetry

Abstract

We demonstrate that phase-difference between terahertz signals on the source and drain of a field effect transistor (a TeraFET) induces a plasmon-assisted dc current, which is dramatically enhanced in vicinity of plasmonic resonances. We describe a TeraFET operation with identical amplitudes of radiation on source and drain antennas but with a phase-shift-induced asymmetry. In this regime, the TeraFET operates as a tunable resonant polarization-sensitive plasmonic spectrometer operating in the sub-terahertz and terahertz range of frequencies. We also propose an effective scheme of a phase-sensitive homodyne detector operating in a phase-asymmetry mode, which allows for a dramatic enhancement of the response. These regimes can be implemented in different materials systems including silicon. The p-diamond TeraFETs could support operation in the 200 to 600 GHz atmospheric windows.

9 pages, 7 figures

References in corpus (2)

• Helicity sensitive terahertz radiation detection by field effect transistors
• Theory of helicity-sensitive terahertz radiation detection by field effect transistors

Cited by in corpus (8)

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• THz detection and amplification using plasmonic Field Effect Transistors driven by DC drain currents
• Plasmonic FET Terahertz Spectrometer
• Carbon nanotubes for polarization sensitive terahertz plasmonic interferometry
• TeraFET terahertz detectors with spatially non-uniform gate capacitances