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A Low Noise 2.7 THz Waveguide-Based Superconducting Mixer

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5 Author(s)
Boussaha, F.M. ; Jet Propulsion Lab., NASA, Pasadena, CA, USA ; Kawamura, J.H. ; Stern, J.A. ; Skalare, A.
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We report on a low noise waveguide-based heterodyne mixer utilizing a superconductiang NbN hot electron bolometer (HEB) operating near 2.7 THz. The mixer is an NbN nano-bridge integrated with a gold bowtie planar antenna on an ultra-thin silicon substrate of ~ 2-3 μm thickness. To produce the waveguide embedding circuit for use at such a high frequency, we adopted a novel approach combining UV-lithography and micro-plating techniques. The mixer response agreed precisely with model predictions, and we measured a minimum uncorrected DSB receiver noise temperature of 965 K at an LO frequency of 2.74 THz.

Published in:

Terahertz Science and Technology, IEEE Transactions on  (Volume:2 ,  Issue: 3 )

Date of Publication:

May 2012

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