Quantum noise in a terahertz hot electron bolometer mixer
Artikel i vetenskaplig tidskrift, 2010

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 beta-factor (the quantum efficiency of the HEB) obtained experimentally agrees reasonably well with the calculated value.

millimetre wave mixers

bolometers

quantum noise

Författare

W. Zhang

SRON Netherlands Institute for Space Research

Purple Mountain Observatory Chinese Academy of Sciences

Pourya Khosropanah

SRON Netherlands Institute for Space Research

J. R. Gao

SRON Netherlands Institute for Space Research

Delft University of Technology

Erik Kollberg

Chalmers, Teknisk fysik, Fysikalisk elektronik

K. S. Yngvesson

University of Massachusetts

T. Bansal

Delft University of Technology

SRON Netherlands Institute for Space Research

R. Barends

Delft University of Technology

T. M. Klapwijk

Delft University of Technology

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 96 111113 - 111113

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1063/1.3364936