TY  - JOUR
AU  - Baselmans, J. J. A.
AU  - Hajenius, M.
AU  - Gao, J. R.
AU  - Klapwijk, T. M.
AU  - de Korte, P. A. J.
AU  - Voronov, B.
AU  - Gol'tsman, G.
PY  - 2004
DA  - 2004//
TI  - Doubling of sensitivity and bandwidth in phonon cooled hot electron bolometer mixers
T2  - Appl. Phys. Lett.
JO  - Appl. Phys. Lett.
SP  - 1958
EP  - 1960
VL  - 84
IS  - 11
KW  - NbN HEB mixers
AB  - We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. We show experimentally that both the receiver noise temperature and the gain bandwidth can be improved by more than a factor of 2 by cleaning the interface and adding an additional superconducting interlayer to the contact pad. Using this we obtain a double sideband receiver noise temperature TN,DSB=950 Kat 2.5 THz and 4.3 K, uncorrected for losses in the optics. At the same bias point, we obtain an IF gain bandwidth of 6 GHz.
UR  - https://doi.org/10.1063/1.1667012
DO  - 10.1063/1.1667012
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=352), last updated on Tue, 18 May 2021 13:14:40 -0500
ID  - Baselmans_etal2004
ER  -