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Hairui Liu 1, 2*, Junsheng Yu 1, Peter Huggard 2* and Byron Alderman 2
1 Beijing University of Posts and Telecommunications, Beijing, 100876, P.R. China
2 MMT Group, RAL Space, STFC Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK
*1 Email: liuhairui1983@126.com ; *2 Email: Peter.Huggard@stfc.ac.uk
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Abstract: Schottky barrier diodes have several advantages when used as millimetre wave and terahertz video, or power detectors. These include their inherent small physical size, a broadband spectral response, a sub-nanosecond response time and room temperature operation. This paper describes the use of air-bridged GaAs Schottky diodes, fabricated at the STFC Rutherford Appleton Laboratory, as such rectifying detectors. Incoming radiation is coupled to the forward biased diodes via a hemispherical silicon lens and a broadband planar bow-tie antenna: the rectified signal then passes to a low noise amplifier. A compact, high speed, photonic system, based on 1.55 µm wavelength fibre-optic telecoms components and a waveguide photomixer, provides the test signal. The spectral dependence of responsivity and noise performance of the detectors will be reported.
Keywords: Schottky diodes, THz, Detector.
Published: 2011-9-30
Cite this article:
Hairui Liu, Junsheng Yu, Peter Huggard and Byron Alderman. Measurements of Schottky-Diode Based THz Video Detectors[J]. International Journal of Terahertz Science and Technology, 2011, Vol.4, No.3: 104-108. DOI:10.11906/TST.104-108.2011.09.15
URL: http://www.tstnetwork.org/10.11906/TST.104-108.2011.09.15
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