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Three Quanta Sensitivity Superconductor–Insulator–Superconductor Mixer for the 0.78–0.95 THz Band.
- Source :
- Applied Physics Express; Oct2009, Vol. 2 Issue 10, p1-1, 1p
- Publication Year :
- 2009
-
Abstract
- We have successfully demonstrated a low-noise 0.78–0.95-THz waveguide mixer based on Nb/AlO<subscript>x</subscript>/Nb superconductor–insulator–superconductor (SIS) junctions integrated with an NbTiN/SiO<subscript>2</subscript>/Al superconducting inverted microstrip. The mixer employs a twin-junction tuning circuit and an impedance transformer which are designed to achieve both low noise and wideband operation. Corrected for optical input losses in front of the mixer, the double-sideband (DSB) noise temperature is below 120 K (<3 hf/k<subscript>B</subscript>) around the local oscillator (LO) frequency of 0.88 THz and at an operating temperature of 2 K. The results represent state-of-the-art performance for mixers in the terahertz frequency range. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18820778
- Volume :
- 2
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Applied Physics Express
- Publication Type :
- Academic Journal
- Accession number :
- 100161801
- Full Text :
- https://doi.org/10.1143/APEX.2.102201