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Published March 15, 2010 | Version Published
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Quantum noise in a terahertz hot electron bolometer mixer

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Abstract

We have measured the noise temperature of a single, sensitive superconducting NbN hot electron bolometer (HEB) mixer in a frequency range from 1.6 to 5.3 THz, using a setup with all the key components in vacuum. By analyzing the measured receiver noise temperature using a quantum noise (QN) model for HEB mixers, we confirm the effect of QN. The QN is found to be responsible for about half of the receiver noise at the highest frequency in our measurements. The β-factor (the quantum efficiency of the HEB) obtained experimentally agrees reasonably well with the calculated value.

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Identifiers

Eprint ID
65320
Resolver ID
CaltechAUTHORS:20160311-151453049

Funding

Chinese Academy of Sciences
National Natural Science Foundation of China
10803021
National Natural Science Foundation of China
10621303
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Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
Koninklijke Nederlandse Akademie van Wetenschappen (KNAW)

Dates

Created
2016-03-14
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Updated
2021-11-10
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