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.

bolometers

millimetre wave mixers

quantum noise

Författare

W. Zhang

Purple Mountain Observatory Chinese Academy of Sciences

Netherlands Institute for Space Research (SRON)

Pourya Khosropanah

Netherlands Institute for Space Research (SRON)

J. R. Gao

Technische Universiteit Delft

Netherlands Institute for Space Research (SRON)

Erik Kollberg

Chalmers, Teknisk fysik, Fysikalisk elektronik

K. S. Yngvesson

University of Massachusetts

T. Bansal

Technische Universiteit Delft

Netherlands Institute for Space Research (SRON)

R. Barends

Technische Universiteit Delft

T. M. Klapwijk

Technische Universiteit Delft

Applied Physics Letters

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

Vol. 96 111113 - 111113

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1063/1.3364936