ISSTT Proceedings

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Optimization of the Normal Metal Hot-Electron Microbolometer

Authors:
D. Chouvaev, D. Golubev, M. Tarasov, L. Kuzmin
Abstract:
The purpose of our project is to create a robust fully on-chip integrated antenna-coupled bolorneter, competitive in sensitivity for radio-astronomy applications. It must have noise equivalent power (NEP) below 10-17 W/Hz1/2 and time constant shorter then 1 ms. We call this device a normal metal hot-electron microbolometer (NHEB), because its function is based on the hot-electron effect in a strip of a normal metal at temperatures below 0.5 K. Until now we have been developing the power sensor for this device. In the beginning we could not operate the sensor at electronic temperatures below 300 mK, presumably because of the high external noise load. Our latest results show how this problem can be solved experimentally. We have achieved noise performance mostly limited by the amplifier, which corresponds to expected detector NEP on the order of 1.5×10-17 W/Hzl/2 at 100 mK.
Categories:
Miscellaneous
Year:
1999
Session:
11
Full-text:
Download a PDF of this paper.
Page Number(s):
552-565