ISSTT Proceedings

ISSTT Proceedings

You searched for:search icon

No Keywords
Showing 0 of items from your search. Start over 

Fabrication And Receiver Measurements Of A Diffusion-Cooled Hot-Electron Bolometer At 800 Ghz

Authors:
J. Stodolka, K. Jacobs
Abstract:
We present a fabrication process for diffusion-cooled niobium hot-electron bolometers using a self-aligned process with gold as an initial protection layer and aluminum as an etch mask that is removed by a wet etch. This process proves to be reproducible and has a yield of ~70 % per batch. Great care has been taken to avoid processing temperatures above 120 °C to minimize degradation of the Nb film. We have performed heterodyne measurements of an HEB in a fixed tuned waveguide mixer at 804 GHz and at an IF-range from 1-2 GHz. The approximate dimensions of the bridge are 240 x 200 x 14 nm³. The Niobium bridge has a critical temperature of 6.0 K and a normal state resistance of 16.5 [Ohm]. A standard Y-factor measurement leads to a minimum noise temperature of 1200 K at 1 GHz IF. The coupled LO-power is estimated by the isothermal method to be 21 nW.
Categories:
HEB Mixers
Year:
2001
Session:
2
Full-text:
Download a PDF of this paper.
Page Number(s):
47-54