TY  - CONF
AU  - Hubers, H-W
AU  - Semenov, A.
AU  - Richter, H.
AU  - Schwarz, M.
AU  - Gunther, B.
AU  - Smirnov, K.
AU  - Gol’tsman, G.
AU  - Voronov, B.
A2  - Millimeter and Submillimeter Detectors for Astronomy II
ED  - Zmuidzinas, J.
ED  - Holland, W. S.
ED  - Withington, S.
PY  - 2004
DA  - 2004//
TI  - Heterodyne receiver for 3-5 THz with hot-electron bolometer mixer
T2  - Proc. SPIE
BT  - Proc. SPIE
SP  - 579
EP  - 586
VL  - 5498
PB  - SPIE
KW  - NbN HEB mixers
AB  - Heterodyne receivers for applications in astronomy and planetary research need quantum limited sensitivity. In instruments which are currently build for SOFIA and Herschel superconducting hot electron bolometers (HEB) will be used to achieve this goal at frequencies above 1.4 THz. The local oscillator and the mixer are the most critical components for a heterodyne receiver operating at 3-5 THz. The design and performance of an optically pumped THz gas laser optimized for this frequency band will be presented. In order to optimize the performance for this frequency hot electron bolometer mixers with different in-plane dimensions and logarithmic-spiral feed antennas have been investigated. Their noise temperatures and beam patterns were measured. Above 3 THz the best performance was achieved with a superconducting bridge of 2.0 x 0.2 μm[super:2] incorporated in a logarithmic spiral antenna. The DSB noise temperatures were 2700 K, 4700 K and 6400 K at 3.1 THz, 4.3 THz and 5.2 THz, respectively. The results demonstrate that the NbN HEB is very well suited as a mixer for THz heterodyne receivers up to at least 5 THz.
UR  - https://doi.org/10.1117/12.552974
DO  - 10.1117/12.552974
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1483), last updated on Mon, 17 May 2021 23:46:07 -0500
ID  - Hubers_etal2004
ER  -