R. A. Wyss, A. Neto, W. R. Mcgrath, B. Bumble, H. Leduc
spectral response of twin-slot antennas
B. S. Karasika, M. C. Gaidis, W. R. Mcgrath, B. Bumble, H. G. Leduc
The noise performance of a Nb hot-electron bolometer mixer at 2.5 THz has been investigated, The devices are fabricated from a 12 nm thick Nb film, and have a 0.30 pmxO. 15 urn in-plane size, thus...
Abstract—The impedance of the superconducting hot-electron bolometer mixer was measured in the range 0.2-4 GHz. A special technique relying on determination of the Sz, transmission parameter of the...
Bumble Frerking Laboratory, P. Febvrel, W. R. Mcgrath, P. Batelaan, H. G. Leduc, B. Bumble, ...
A receiver using an S1S waveguide mixer with two mechanical tuners has been characterized from 460 GHz to 640 GHz. The mixer uses S1S tunnel junctions with integrated superconductive RF circuits to...
Salez, M., Febvre, P., McGrath, W. R., Bumble, B., LeDuc, H. G.
A 600 GHz - 635 GHz waveguide SIS heterodyne receiver was built and used for astronomical observations at the Caltech Submillimeter Observatory (CSO) in Hawaii.
Superconducting Hot-Electron Bolometer Mixes at 0.5 Terahertz (2004)
Skalare, A., McGrath, W. R., Bumble, B., Leduc, H. G., Burke, P. J., Verheijen, A. A., ...
A Superconducting Hot Electron Bolometer Mixer for 530 GHz (2004)
Skalare, A., McGrath, W.R., Bumble, B., LeDuc, H.G., Burke, P.J., Verheijen, A.A., ...
This paper describes a superconducting hot electron bolometer mixer that uses diffusion rather than interactions with phonons as a cooling mechanism for the hot electrons. The bolometer is a 0.14...
A Quasiparticle SIS Heterodyne Reciever at 600 GHz - 635 GHz (2004)
Salez, M., Febvre, P., McGrath, W.R., Bumble, B., LeDuc, H.G.
Low-Noise Wide Bandwith, Hot Electron Bolometer Mixers for Submillimeter Wavelengths (2004)
Recently a novel superconductive hot-electron micro-bolometer has been proposed which is both fast and sensitive (D. E. Prober, Appl. Phys. Lett. 62, 2119, 1993). This device has several important...
Micromachined Silicon Waveguide Circuits (2004)
Rectangular waveguides are commonly used as circuit elements in remote-sensing heterodyne receivers at millimeter wavelengths. The advantages of waveguides are low loss and mechanical tunability....
Superconducting Hot Electron Bolometer Mixers for Submillimeter Receivers (2004)
Skalare, A., McGrath, W.R., Bumble, B., LeDuc, H.G., Burke, P.J., Verheijen, A.A., ...
Noise Temperature and IF Bandwidth of a 530 GHz Heterodyne Receiver Employing a Diffusion- (2004)
We report on the first heterodyne measurements with a diffusion-cooled hot-electron bolometer
Analysis of a High-Tc Hot-Electron Superconducting Mixer for Terahertz Applications (2004)
Karasik, B. S., McGrath, W. R., Gaidis, M. C.
The prospects of a YBa2Cu3O7(delta)(YBCO) hot-electron bolometer (HEB) mixer for a THz heterodyne receiver is discussed. The modeled device is a submicron bridge made from a 10 nm thick film on a...
Febvre, P., Salez, M., McGrath, W. R., Bumble, B., LeDuc, H. G.
We have measured the noise temperature of heterodyne receivers employing
Development of a High-Tc Hot-Electron Superconducting Mixer for Terahertz Applications (2004)
Karasik, B., McGrath, W. R., Gaidis, M., Burns, M. J., Kleinsasser, A. W., Delin, K. A., ...
Karasik, B. S., McGrath, W. R., Gaidis, M. C., Burns, M. J., Kleinsasser, A. W., Delin, K. A., ...
The development of a YBa2Cu3O7-(Kronecker delta)(YBCO) hot-electron bolometer (HEB) quasioptical mixer for a 2.5 heterodyne receiver is discussed. The modeled device is a submicron bridge made from a...
Niobium Superconducting Diffusion-Cooled Hot-Electron Bolometer MIxers Above 1 THz (2004)
Skalare, A., McGrath, W. R., Bumble, B., LeDuc, H. G., Burke, P. J., Schoelkopf, R. J., ...
Superconducting hot-electron bolometers are a promising option for low noise heterodyne detector systems at frequencies above 1THz. More...
Fabrication of High-Tc Hot-Electron Bolometric Mixers for Terahertz Applications (2004)
Burns, M. J., Kleinsasser, A. W., Delin, K. A., Vasquez, R. P., Karasik, B. S., McGrath, W. R., ...
Superocnducting hot-electron bolometers (HEB) represent a promising candidate for heterodyne mixing at frequencies exceeding 1 THz. Nb HEB mixers offer performance competitive with tunnel junctions...
Niobium Superconducting Diffusion-Cooled Hot-Electron Bolometer Mixers Above 1 THz (2004)
Skalare, A., McGrath, W. R., Bumble, B., LeDuc, H. G., Burke, P. J., Schoelkopf, R. J., ...
Large Bandwidth and Low Noise in a Diffusion-Cooled Hot-Electron Bolometer Mixer (2004)
Skalare, A., McGrath, W. R., Bumble, B., LeDuc, H. G., Burke, P. J., Verheijen, A. A., ...
X Heterodyne measurements have been made at 533 GHz using a novel superconducting hot-electron bolometer in a waveguide mixer. The bolometer is a 0.3 ??ong niobium microbridge with Tc=(approx. equal...
The impedance of the supconducting hot-electron bolometer mixer was measured in the range 0.2-4 GHz. A special technique relying on determination of S21 transmission parameter of the device was used....
Optimal Choice of Material for HEB Superconducting Mixers (2004)
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 rather due to the different properties of...
A Frequency-Domain Mixer Model for Diffusion-Cooled Hot-Electron Bolometers (2004)
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.
Submillimeter Astronomy Investigation of Line Specra (SAILS) - a balloon borne instrument (2004)
Seiffert, M. D., Langer, W. D., Lord, S.D., Pearson, J., McGrath, W. R.
The Submillimeter Astronomy Investigation of Line Specra (SAILS) is a balloon-borne experiment under study for a 100 day ultra-long duration balloon mission. The experiment would survey the galactic...
Karasik, B. S., McGrath, W. R., Gershenson, M. E., Sergeev, A. V.
Recently we have presented a concept for a hot-electron direct detector (HEDD) capable of counting single millimeter-wave photons.
Aluminum hot-electron bolometer mixers at submillimeter wavelenghts (2004)
Skalare, A., McGrath, W. R., Ecternach, P. M., LeDuc, H. G., Siddiqi, I., Verevkin, A., ...
Diffusion-cooled aluminum hot-electron bolometer (HEB) mixers are of interest for low-noise high resolution THz frequency spectroscopy within astrophysics.
A Hot-Electron Direct Detector for Radioastronomy (2004)
Karasik, B. S., McGrath, W. R., LeDuc, H. G., Gershenson, M. E.
A hot-electron transition-edge superconducting bolomere with adjustable thermal relaxation speed is proposed.
SubMM wave superconducting hot-electron direct detectors (2004)
Karasik, B., Delaet, B., McGrath, W. R., Wei, J., Gershenson, M. E., Sergeev, A. V.
Experimental study of SubMM wave superconducting hot-electron direct detectors (2004)
Karasik, B. S., Delaet, B., McGrath, W. R., Wei, J., Gershenson, M. E., Sergeev, A. V.
Hot-electron superconductive direct detectors for submillimeter wavelengths (2004)
Karasik, B., Delaet, B., McGrath, W. R., Gershenson, M. E., Wei, J., Sergeev, A. V.
SUBMM wave superconduction hot-electron direct detectors (2004)
Karasik, B. S., Delaet, B., McGrath, W. R., LeDuc, H. G.
Recently, we have presented a concept for a hot-electron direct detector (HEDD) capable of counting single millimeter-wave photons. Such a detector meets the needs of future space far-infrared...
Pearson, J. C., Mehdi, I., Schlecht, E., Maiwald, F., Maestrini, A., Gill, J., ...
The Heterodyne Instrument for Far Infrared (HIFI) on ESA's Herschel Space Observatory is comprised of five SIS receiver channels covering 480-1250 GHz and two HEB receiver channels covering 1410-1910...
Experimental study of superconducting hot-electron sensors for SubMM astronomy (2004)
Karasik, B. S., Delaet, B., McGrath, W. R., Wei, J., Gershenson, M. E., Sergeev, A. V.
The superconductin and noise properties of micron-size hot-electron sensors made from thin Ti film are studied.
Improved equivalent circuit for twin slot terahertz receivers (2004)
Series-fed coplanar waveguide embedding circuits are being developed for terahertz mixers using, in particular, submicron-sized superconducting devices, such as hot electron bolometers as the...
Electromagnetic model for twin slot terahertz mixers (2004)
Focardi, P., Neto, A., McGrath, W. R.
Twin slot antennas coupled to superconducting devices are currently being developed for terahertz mixers and direct detectors for astronomical observations.
McGrath,W. R., Richards,P. L., Smith,A. D., Kempen,H. Van, Batchelor,R. A.
We have measured the properties of a superconductor-insulator-superconductor (SIS) quasiparticle mixer which is operated in the quantum limit. Single sideband conversion gain larger than +4 dB was...
Quasiparticle Harmonic Mixing with SIS Junctions, (2002)
Smith,A. D., Batchelor,R. A., McGrath,W. R., Richards,P. L., Van Kempen,H.
We have demonstrated quasiparticle harmonic mixing of a 36 GHz signal with an 18 GHz local oscillator in tin SIS junctions. Harmonic mixers can have important advantages at high microwave frequencies...
Microwave Mixing and Direct Detection Using SIS and SIS' Quasiparticle Tunnel Junctions, (2002)
Smith,A. D., McGrath,W. R., Richards,P. L., Harris,R. E., Lloyd,F. L.
Quasiparticle mixers have shown strong quantum effects, conversion gain, and noise levels approaching the quantum limit, but only in tunnel junctions with very low sub-gap 'leakage' conductance. It...
Von Harrach, D., Il'in, K. S., Siegel, M., Karasik, B. S., McGrath, W. R., De Lange, G.
This version is available at the following Publisher URL: http://apl.aip.org
Applications of Submillimeter Wave Technology for SDI, (1998)
Kile, J. N., McGrath, W. R., LeDuc, H. G., Siegel, P. H., Smith, R. P.
This paper examines the potential use of using submillimeter wave technology (actually 3 mm to 100 micrometers, or frequencies between 100 GHz and 3 THz) for SDI applications, especially for endo-KEW...
A novel noncontacting waveguide backshort for submillimeter wave frequencies (1995)
Katehi, Linda P. B., McGrath, W. R., Weller, T. M.
A novel noncontacting waveguide backshort has been developed for millimeter wave and submillimeter wave frequencies. It employs a metallic bar with rectangular or circular holes. The size and spacing...