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Displaying 201 - 225 of 446

Antenna coupled niobium bolometers for 10 (mu)m radiation detection

June 1, 2005
Author(s)
Robert Hadfield, Aaron J. Miller, Sae Woo Nam, Erich N. Grossman, Robert E. Schwall,
We report on the fabrication and testing of antenna-coupled niobium bolometers for 10-micron wavelength radiation detection. We use 20 nm thick Nb films on oxidized Si substrates. The bolometer design consists of a 1 micron x 1 micron Nb microbridge

All-NbN Digital-to-Analog Converters for a Programmable Voltage Standard

November 21, 2001
Author(s)
Hirotake Yamamori, M. Itoh, H. Sasaki, A. Shoji, Samuel Benz, Paul Dresselhaus
Five-bit all-NbN digital-to-analog converters (DACs) for a programmable voltage standard have been fabricated using NbN/TiNx/NbN Josephson junctions and their operation has been demonstrated. The DAC consists of six arrays of 128, 128, 256, 512, 1024 and

A 110 GHz Comb Generator in a 250 nm InP HBT Technology

April 18, 2022
Author(s)
Jerome Cheron, Dylan Williams, Richard Chamberlin, Miguel Urteaga, Paul D. Hale, Rob Jones, Ari Feldman
We report a monolithic microwave integrated-circuit (MMIC) comb generator capable of producing a repetitive narrow pulse (7.1 ps pulse duration) with sharp edges (4.2 ps falling time). The circuit is designed in a 250 nm Indium Phosphide (InP)

When "Optimal Filtering" Isn't

December 7, 2016
Author(s)
Joseph Fowler, Bradley Alpert, W.Bertrand (Randy) Doriese, James P. Hays-Wehle, Young I. Joe, Kelsey Morgan, Galen O'Neil, Joel Ullom, Dan Schmidt, Daniel Swetz
The so-called ''optimal filter'' analysis of a microcalorimeter's x-ray pulses is statistically optimal only if all pulses have the same shape, regardless of energy. The shapes of pulses from a nonlinear detector can and do depend on the pulse energy

Optical fiber-coupled cryogenic radiometer with carbon nanotube absorber

April 1, 2012
Author(s)
David J. Livigni, Nathan A. Tomlin, Christopher L. Cromer, John H. Lehman
A cryogenic radiometer was constructed for direct-substitution optical fiber power measurements. The cavity is intended to operate at the 3 K temperature stage of a dilution refrigerator or 4.2 K stage of a liquid cryostat. The optical fiber is removable

Optical fibre-coupled cryogenic radiometer with carbon nanotube absorber

March 2, 2012
Author(s)
David J. Livigni, Nathan A. Tomlin, Christopher L. Cromer, John H. Lehman
A cryogenic radiometer was constructed for direct-substitution optical-fibre power measurements. The cavity is intended to operate at the 3 K temperature stage of a dilution refrigerator or 4.2 K stage of a liquid cryostat. The optical fibre is removable

Chiral Microwave Nonreciprocity Demonstrated via Rayleigh and Sezawa Modes Supported in an Al0.58Sc0.42N/4H-SiC PlatformPlatform

March 24, 2025
Author(s)
A. Will-Cole, Xingyu Du, Bin Luo, Valeria Lauter, Alexander Grutter, Lisa Hackett, Michael Miller, Yuanchen Deng, Brandon Smith, Olivia Pitcl, Nian X. Sun, III Olsson, Matt Eichenfield
Chirality plays a crucial role in the helicity mismatch between surface acoustic waves and magnetic spin waves, leading to nonreciprocal transmission of acoustic power for coupled magnetoacoustic modes. Acoustic modes with both longitudinal and shear

Orphan High Field Superconductivity in Non-Superconducting Uranium Ditelluride

April 19, 2024
Author(s)
Corey Frank, Sylvia Lewin, Gicela Saucedo Salas, Peter Czajka, Ian Hayes, Hyeok Yoon, Tristin Metz, Johnpierre Paglione, John Singleton, Nicholas Butch
Reentrant superconductivity is an uncommon phenomenon in which the destructive effects of magnetic field on superconductivity are mitigated, allowing a zero-resistance state to survive under conditions that would otherwise destroy it. Typically, the

Guide to Bluetooth Security

May 8, 2017
Author(s)
John Padgette, John Bahr, Mayank Batra, Marcel Holtmann, Rhonda Smithbey, Lidong Chen, Karen Scarfone
Bluetooth wireless technology is an open standard for short-range radio frequency communication used primarily to establish wireless personal area networks (WPANs), and has been integrated into many types of business and consumer devices. This publication

GAUSSIAN PROCESS REGRESSION (GPR) REPRESENTATION IN PREDICTIVE MODEL MARKUP LANGUAGE (PMML)

March 29, 2017
Author(s)
Jinkyoo Park, David Lechevalier, Ronay Ak, Max K. Ferguson, Kincho H. Law, Yung-Tsun Lee, Sudarsan Rachuri
This paper describes a Predictive Model Markup Language (PMML) representation of Gaussian Process Regression (GPR) models. PMML is an XML-based standard language used to represent data mining and predictive analytic models, as well as pre- and post
Displaying 201 - 225 of 446
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