Terahertz mixing in MgB2 microbolometers
Journal article, 2007
Authors report on a terahertz (600 GHz) mixing experiment with MgB2 microbolometers in the resistive state. We observed that for a 20 nm film a mixer gain bandwidth of 2.3 GHz can be achieved, corresponding to an energy relaxation time of 70 ps. The experimental results were analyzed using a two-temperature model. As a result, the phonon escape time 20 ps was deduced. At 1.6THz the MgB2 mixer uncorrected noise temperature was 11000K. The obtained results show that MgB2 bolometers are good prospects for the terahertz range as both broadband mixers and fast direct detectors.
MgB2
acoustic matching
superconducting films
mixer
terahertz
Author
Serguei Cherednichenko
Chalmers, Microtechnology and Nanoscience (MC2), Microwave and Terahertz Technology
Vladimir Drakinskiy
Chalmers, Microtechnology and Nanoscience (MC2), Microwave and Terahertz Technology
Kenji Ueda
Nippon Telegraph and Telephone Corporation
Michio Naito
Nippon Telegraph and Telephone Corporation
Tokyo University of Agriculture and Technology
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 90 2 023507Subject Categories
Condensed Matter Physics
DOI
10.1063/1.2430928