Search Results - "McGrath, W.R."

Record-Low NEP in Hot-Electron Titanium Nanobolometers by Karasik, B.S., Olaya, D., Jian Wei, Pereverzev, S., Gershenson, M.E., Kawamura, J.H., McGrath, W.R., Sergeev, A.V.

“…We are developing hot-electron superconducting transition-edge sensors (TES) capable of counting THz photons and operating at . We fabricated superconducting…”
Get full text

Design guidelines for terahertz mixers and detectors by Focardi, P., McGrath, W.R., Neto, A.

“…Twin-slot antennas and coplanar waveguides are a popular choice for coupling signals to state-of-the-art mixers and detectors at terahertz frequencies…”
Get full text

Coplanar-waveguide-based terahertz hot-electron-bolometer mixers mproved embedding circuit description by Focardi, P., Neto, A., McGrath, W.R.

“…Series-fed coplanar-waveguide embedding circuits have been recently developed for terahertz mixers using, in particular, superconducting devices as sensors…”
Get full text

Experimental study of superconducting hot-electron sensors for submm astronomy by Karasik, B.S., Delaet, B., McGrath, W.R., Jian Wei, Gershenson, M.E., Sergeev, A.V.

“…Relaxation, noise, and spectral properties of micron-size hot-electron sensors made from thin Ti film are studied. Due to the small heat capacity of electrons,…”
Get full text

Aluminum hot-electron bolometer mixers at submillimeter wavelengths by Skalare, A., McGrath, W.R., Echternach, P.M., LeDuc, H.G., Siddiqi, I., Verevkin, A., Prober, D.E.

“…Diffusion-cooled aluminum hot-electron bolometer (HEB) mixers are of interest for low-noise high resolution THz-frequency spectroscopy within astrophysics. Al…”
Get full text

Speed measurements of diffusion-cooled tantalum bolometers by Skalare, A., McGrath, W.R., Bumble, B., LeDuc, H.G.

“…Thin tantalum films were deposited on silicon wafers using a niobium seed layer to promote alpha-phase growth. These films were patterned into submicrometer…”
Get full text

Noise and conversion efficiency of aluminum superconducting hot-electron bolometer mixer by Siddiqi, I., Verevkin, A., Prober, D.E., Skalare, A., Karasik, B.S., McGrath, W.R., Echternach, P., LeDuc, H.G.

“…We report on microwave measurements of superconducting aluminum hot-electron bolometers (Al HEBs). Diffusion-cooled Al HEB mixers are good candidates for…”
Get full text

Noise bandwidth of diffusion-cooled hot-electron bolometers by Schoelkopf, R.J., Burke, P.J., Prober, D.E., Karasik, B., Skalare, A., McGrath, W.R., Gaidis, M.C., Bumble, B., LeDuc, H.G.

“…We present studies of the input and output noise of diffusion cooled hot-electron bolometer mixers. By simultaneously measuring the gain and noise (with a 14…”
Get full text

Broad-Band RF Match to a Millimeter-Wave SIS Quasi-Particle Mixer by Raisanen, A.V., Mcgrath, W.R., Richards, P.L., Lloyd, F.L.

“…An integrated superconducting microstrip is shown to be a convenient, flexible, and well-characterized matching element for a super-conductor-insulator-…”
Get full text

Performance of Arrays of SIS Junctions in Heterodyne Mixers by Crete, D.-G., Mcgrath, W.R., Richards, P.L.

“…We have made a systematic experimental study of the performance of millimeter-wave quasiparticle heterodyne mixers which use arrays of SIS tunnel junctions…”
Get full text

Silicon micromachined waveguides for millimeter-wave and submillimeter-wave frequencies by McGrath, W.R., Walker, C., Yap, M., Tai, Y.-C.

“…The development of micromachining techniques to create silicon-based waveguide circuits, which can operate up to high submillimeter-wave frequencies, is…”
Get full text

Fabrication of terahertz YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// hot-electron bolometer mixers by Kleinsasser, A.W., Barner, J.B., Burns, M.J., Karasik, B.S., McGrath, W.R.

“…Superconducting hot-electron bolometer (HEB) mixers are promising heterodyne detectors for THz frequencies. HEB mixers operating at 4 K or below offer the…”
Get full text

Fabrication of terahertz YBa/sub 2/Cu/sub 3/O/sub 7-δ/ hot-electron bolometer mixers by Kleinsasser, A.W., Barner, J.B., Burns, M.J., Karasik, B.S., McGrath, W.R.

Get full text

Optimal choice of material for HEB superconducting mixers by Karasik, B.S., McGrath, W.R., Wyss, R.A.

“…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…”
Get full text

A frequency-domain mixer model for diffusion-cooled hot-electron bolometers by Skalare, A., McGrath, W.R.

“…A new frequency domain hot-electron bolometer (HEB) mixer model is described, which takes into account the non-uniform temperature distribution found in…”
Get full text

Micromechanical tuning elements in a 620-GHz monolithic integrated circuit by Lubecke, V.M., McGrath, W.R., Stimson, P.A., Rutledge, D.B.

“…While monolithic integrated-circuit technology promises a practical means for realizing reliable reproducible planar millimeter and submillimeter-wave…”
Get full text

Novel hot-electron bolometer mixers for submillimeter applications: an overview of recent developments by McGrath, W.R.

“…There has been a resurgence of interest in bolometers as heterodyne mixers at submillimeter wavelengths. This is due primarily to two new and innovative…”
Get full text

Fabrication of high-T/sub c/ hot-electron bolometric mixers for terahertz applications by Burns, M.J., Kleinsasser, A.W., Delin, K.A., Vasquez, R.P., Karasik, B.S., McGrath, W.R., Gaidis, M.C.

“…Superconducting hot-electron bolometers (HEB) represent a promising candidate for heterodyne mixing at frequencies exceeding 1 THz. Nb HEB mixers offer…”
Get full text

Receiver measurements at 1267 GHz using a diffusion-cooled superconducting transition-edge bolometer by Skalare, A., McGrath, W.R., Bumble, B., LeDuc, H.G.

“…We report receiver noise temperature measurements using a quasioptically coupled diffusion-cooled hot-electron bolometer mixer at a local oscillator frequency…”
Get full text

A low-noise 2.5 THz superconductive Nb hot-electron mixer by Karasik, B.S., Gaidis, M.C., McGrath, W.R., Bumble, B., LeDuc, H.G.

“…We report on the development of a quasioptical Nb hot-electron bolometer mixer for a 2.5 THz heterodyne receiver. The devices are fabricated from a 12 nm thick…”
Get full text