Zobrazeno 1 - 10
of 69
pro vyhledávání: '"William R. McGrath"'
Autor:
David Olaya, Jian Wei, Jonathan H. Kawamura, Andrei Sergeev, Sergei V. Pereverzev, Boris S. Karasik, Michael Gershenson, William R. McGrath
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:293-297
We are developing hot-electron superconducting transition-edge sensors (TES) capable of counting THz photons and operating at . We fabricated superconducting Ti nanosensors with Nb contacts with a volume of on planar Si substrates and have measured t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99418e4e26ed7690b2ac8d49ff612495
https://doi.org/10.1109/tasc.2007.897167
https://doi.org/10.1109/tasc.2007.897167
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques, 5, 53, 1653-1660
IEEE Transactions on Microcrowave Theory and Techniques, May, 5, 53, 1653-1661
IEEE Transactions on Microcrowave Theory and Techniques, May, 5, 53, 1653-1661
Twin-slot antennas and coplanar waveguides are a popular choice for coupling signals to state-of-the-art mixers and detectors at terahertz frequencies. Although these sensors show promising performance in terms of noise temperature, they usually also
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c37a3ce84934f20529c88f5c2869552
https://doi.org/10.1109/tmtt.2005.847058
https://doi.org/10.1109/tmtt.2005.847058
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 13:160-163
Thin tantalum films were deposited on silicon wafers using a niobium seed layer to promote alpha-phase growth. These films were patterned into submicrometer size diffusion-cooled bolometers with superconducting transition temperatures of up to 2.35 K
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af528b99cd6a56db035d6ace7b9525e0
https://doi.org/10.1109/tasc.2003.813670
https://doi.org/10.1109/tasc.2003.813670
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques, 10, 50, 2374-2383
Series-fed coplanar-waveguide embedding circuits have been recently developed for terahertz mixers using, in particular, superconducting devices as sensors. Although these mixers show promising performance, they usually also show a considerable downw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c18bdad81bdf72ba5c9da3a753e0c555
https://doi.org/10.1109/tmtt.2002.803448
https://doi.org/10.1109/tmtt.2002.803448
Autor:
Anders Skalare, William R. McGrath, Daniel E. Prober, A. Verevkin, Henry G. LeDuc, P. M. Echternach, I. Siddiqi
Publikováno v:
Journal of Applied Physics. 91:4646-4654
We present microwave (30 GHz) measurements on aluminum superconducting hot-electron bolometer (HEB) mixers. Aluminum HEB mixers have a lower superconducting transition temperature than niobium and niobium nitride devices, and are predicted to have im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98d6ac7aa7de42d61f4ea142f47de569
https://doi.org/10.1063/1.1448865
https://doi.org/10.1063/1.1448865
Autor:
William R. McGrath, Anders Skalare, Boris S. Karasik, P. M. Echternach, A. Verevkin, Daniel E. Prober, Henry G. LeDuc, I. Siddiqi
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 11:958-961
We report on microwave measurements of superconducting aluminum hot-electron bolometers (Al HEBs). Diffusion-cooled Al HEB mixers are good candidates for space-borne applications in the Terahertz frequency range since they are predicted to have small
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::caa880f4211ac1404a8ff5a28c3d6470
https://doi.org/10.1109/77.919507
https://doi.org/10.1109/77.919507
Autor:
P. M. Echternach, Daniel E. Prober, Anders Skalare, William R. McGrath, A. Verevkin, I. Siddiqi, Henry G. LeDuc
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 11:641-644
Diffusion-cooled aluminum hot-electron bolometer (HEB) mixers are of interest for low-noise high resolution THz-frequency spectroscopy within astrophysics. Al HEB mixers offer operation with an order of magnitude less local oscillator power, higher i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b18aeab8d7f1b1aaefba15677e143d9
https://doi.org/10.1109/77.919426
https://doi.org/10.1109/77.919426
Autor:
William R. McGrath, Anders Skalare
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:4444-4447
A new frequency domain hot-electron bolometer (HEB) mixer model is described, which takes into account the non-uniform temperature distribution found in superconducting diffusion-cooled devices. In this model the bolometer is discretized into a finit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::463c1e8c96b4be428f8633780e5ff2ee
https://doi.org/10.1109/77.784011
https://doi.org/10.1109/77.784011
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:4197-4200
Superconducting hot-electron bolometer (HEB) mixers are promising heterodyne detectors for THz frequencies. HEB mixers operating at 4 K or below offer the possibility of near-quantum-limited performance without an upper frequency limit imposed by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57d18b2ea6bf8a61680c4d5ae1bf6387
https://doi.org/10.1109/77.783950
https://doi.org/10.1109/77.783950
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:4213-4216
We demonstrate that a potential distinction in ultimate performance of phonon-cooled and diffusion-cooled HEB mixers is not due to the cooling mechanisms but rather due to the different properties of available superconductors. The only available mate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3299eb0d69aa29b90894ac5fef52c85b
https://doi.org/10.1109/77.783954
https://doi.org/10.1109/77.783954