ISSTT Proceedings

ISSTT Proceedings

You searched for:search icon

No Keywords
Showing 0 of items from your search. Start over 

Quasi-Optical Terahertz SIS Mixer

Authors:
A.M. Baryshev, B.D. Jackson, G. de Lange, S.V. Shitov, N. Iosad, J.R. Gao, T.M. Klapwijk
Abstract:
The performance of quasi-optical (Q0) SIS mixers designed for operation around 1 THz is evaluated. Mixers incorporating Si elliptical lens with either double slot-line or double dipole antennas with back reflectors have been fabricated and measured. Nb/Al-A10x/Nb superconductor-insulator-superconductor (SIS) tunnel junctions are integrated with a NbTiN-Si02-Al microstrip circuit to tune out the junction's geometrical capacitance and to match the antenna impedance to the junction over a wide frequency range. The direct response, of the mixer measured by means of a Michelson Fourier transform spectrometer (FTS), is presented showing the mixer's ~30% instantaneous bandwidth. This bandwidth appears to be limited by the material properties of the NbTiN ground plane. Noise temperatures of 245 K @ 850 GHz, 310 K @ 980 GFIz and 400 K @ 1020 GHz are presented. This is a two-fold improvement over best previously reported results for frequencies around 1 THz.
Categories:
SIS
Year:
2000
Session:
2
Full-text:
Download a PDF of this paper.
Page Number(s):
129-138