Gain and Noise in THz MgB2 Hot-Electron Bolometer Mixers With a 30-K Critical Temperature
Journal article, 2017
In this paper, we study variation of the MgB2 hot-electron bolometer mixer characteristics such as noise temperature, gain, output noise, and local oscillator (LO) power at 5-, 15-, and 20-K bath temperatures, and at 0.69- and 1.63-THz LO frequencies. The main reason for the noise temperature rising at higher temperatures is a reduction of the mixer gain, which occurs proportionally to the LO power reduction. Contrary to this, the output noise remains constant (for the same bias point).
superconductivity
mixer
magnesium diboride
hybrid physical chemical vapor deposition (HPCVD)
Hot-electron bolometer (HEB)
thin film.
Author
Evgenii Novoselov
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
Serguei Cherednichenko
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
IEEE Transactions on Terahertz Science and Technology
2156-342X (ISSN) 21563446 (eISSN)
Vol. 7 6 704-710 8080302Infrastructure
Kollberg Laboratory
Nanofabrication Laboratory
Areas of Advance
Nanoscience and Nanotechnology
Materials Science
Subject Categories
Other Electrical Engineering, Electronic Engineering, Information Engineering
Condensed Matter Physics
DOI
10.1109/TTHZ.2017.2760105