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High‐frequency radiation detection by metal‐metal point contacts is investigated as a function of bias voltage at far‐infrared frequencies. Detection occurs through rectification due to a nonlinearity of the current‐voltage characteristic. The relative contribution to the rectification due to an electron phonon scattering mechanism occurring in the bulk material (‘‘spreading resistance’’) is compared with other mechanisms. The spreading resistance nonlinearity was identified by measurements at liquid helium temperatures. For low contact resistances (≲50 Ω) this nonlinearity was generally dominant, for higher resistances it may occur in addition to and independently of the other mechanisms.
Published in:
Journal of Applied Physics
(Volume:55
,
Issue:
4
)
Date of Publication: Feb 1984
- Page(s):
- 1003 - 1011
- ISSN :
- 0021-8979
- Digital Object Identifier :
- 10.1063/1.333192
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 July 2009
- Issue Date :
- Feb 1984
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