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Your search keyword '"W. M. Laauwen"' showing total 2 results
Start Over Author "W. M. Laauwen" Journal ieee transactions on appiled superconductivity
2 results on '"W. M. Laauwen"'

1. Hot electron effect in terahertz hybrid devices

Author

W. M. Laauwen, B. Leone, J. R. Gao, B. D. Jackson, G. de Lange, and T. M. Klapwijk

Subjects
Superconductivity, Materials science, superconducting devices, Condensed matter physics, Phonon, Terahertz radiation, Direct current, Niobium, chemistry.chemical_element, Condensed Matter Physics, terahertz detection, Electronic, Optical and Magnetic Materials, chemistry, Tunnel junction, Condensed Matter::Superconductivity, hot electron effect, Electron temperature, MIXERS, Electrical and Electronic Engineering, Hot-carrier injection
Abstract

We analyse both the direct current and submillimeter pumped cut-rent-voltage characteristics of a hybrid superconductor-insulator-superconductor terahertz, mixer consisting of a Nb tunnel junction integrated with NbTiN tuning striplines. We And that the presence of the Nb/NbTiN interface gives rise to a hot electron effect. The assumption of an equilibrium electron temperature, as distinct from the phonon temperature, allows a complete understanding of the processes involved. The impact of the hot electron effect on superconducting terahertz detectors is discussed.

Published
2001

2. NbTiN/SiO/sub 2//Al tuning circuits for low-noise 1 THz SIS mixers

Author

W. M. Laauwen, N. N. Iosad, Andrey M. Baryshev, G. de Lange, T. M. Klapwijk, B. D. Jackson, and J. R. Gao

Subjects
Noise temperature, Materials science, Yield (engineering), Terahertz radiation, business.industry, Condensed Matter Physics, Waveguide (optics), Electronic, Optical and Magnetic Materials, Optoelectronics, Electrical and Electronic Engineering, business, Sensitivity (electronics), Noise (radio), Electronic circuit, Ground plane
Abstract

Waveguide SIS mixers in which Nb/Al-AlO/sub x//Nb tunnel junctions are integrated with NbTiN/SiO//sub 2//Al tuning circuits are shown to yield receiver noise temperatures as low as 565 K at 970 GHz. Analyzing the noise and gain of one such receiver, it is shown that the NbTiN ground plane is low-loss (

Published
2001

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