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You searched on: Topic Area: Physics Sorted by: date

Displaying records 41 to 50 of 319 records.
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41. IR-enhanced Si reference detectors for 1-step scale transfers from 300 nm to 1000 nm
Topic: Physics
Published: 11/20/2014
Authors: George P Eppeldauer, Thomas C Larason, Jeanne M Houston, Robert Edward Vest, Uwe Arp, Howard W Yoon
Abstract: IR-enhanced Si photodiodes have improved radiometric and electronic characteristics as compared to other widely used Si photodiodes and can be used as responsivity standards in the wavelength range from 300 nm to 1000 nm. Their low predicted uncerta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916505

42. Ultra-Broadband Frequency Comb Generation in Superconducting Resonators
Topic: Physics
Published: 10/30/2014
Authors: David P Pappas, Michael R Vissers, Martin O. Sandberg, Jiansong Gao, Steven R Jefferts, Robert P Erickson
Abstract: Multi-octave frequency combs are generated in superconducting microresonators due to their low loss, strong Kerrlike kinetic inductance nonlinearity, and low frequency dispersion. This effect is illustrated at low frequency (60 MHz to 20 GHz) in long ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915796

43. Extended and Revised Analysis of Singly Ionized Tin: Sn II
Topic: Physics
Published: 10/28/2014
Authors: K. Haris, Alexander Kramida, A. Tauheed
Abstract: The electronic structure of singly ionized tin (Sn II) is partly a one-electron and partly a three-electron system with ground configuration 5s25p. The excited configurations are of the type 5s2nℓ in the one-electron part, and 5s5p2, 5p3 and 5s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915078

44. Phase-Sensitive Detection of Spin Pumping via the ac Inverse Spin Hall Effect
Topic: Physics
Published: 10/6/2014
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Mathias A. Weiler
Abstract: Sources of pure spin currents are a fundamental building block of spintronic devices. In ferromagnet/normal metal heterostructures, spin currents are generated at ferromagnetic resonance. This is known as spin pumping, where spin currents of both ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915317

45. Cryogenic Design and Performance of an Apparatus for Magnetically Trapping Ultracold Neutrons
Topic: Physics
Published: 10/5/2014
Author: Hans P Mumm
Abstract: The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to measure the beta-decay lifetime of the free neutron and is comprised of a high-current su ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917558

46. High-efficiency WSi superconducting nanowire single-photon detectors operating at 2.5 K
Topic: Physics
Published: 9/24/2014
Authors: Varun Boehm Verma, Boris Korzh, Felix Bussieres, Robert D Horansky, Adriana E Lita, Francesco Marsili, Hugo Zbinden, Richard P Mirin, Sae Woo Nam
Abstract: We demonstrate that superconducting nanowire single photon detectors (SNSPDs) fabricated from amorphous WSi may be operated with > 75 % system detection efficiency at a temperature approaching seventy percent of the superconducting transition tem ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915661

47. Weak Localization, Spin Relaxation, and Spin-Diffusion: Crossover Between Weak and Strong Rashba Coupling Limits
Topic: Physics
Published: 9/17/2014
Authors: Yasufumi Araki, Guru Bahadur S Khalsa, Allan H. MacDonald
Abstract: Disorder scattering and spin-orbit coupling are together responsible for the diffusion and relaxation of spin-density in time-reversal invariant systems. We study spin-relaxation and diffusion in a two-dimensional electron gas with Rashba spin-orbit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916181

48. Photon-number uncertainty in a superconducting transition-edge sensor beyond resolved-photon-number determination
Topic: Physics
Published: 9/10/2014
Authors: Zachary H Levine, Boris L. Glebov, Alan L Migdall, Thomas Gerrits, Brice R. Calkins, Adriana E Lita, Sae Woo Nam
Abstract: As part of an effort to extend fundamental single-photon measurements into the macroscopic regime, we explore how best to assign photon-number uncertainties to output waveforms of a superconducting Transition Edge Sensor (TES) and how those assignmen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916283

49. Optimization of Focused Ion Beam-Tomography for Superconducting Electronics
Topic: Physics
Published: 8/27/2014
Authors: Aric Warner Sanders, Anna E Fox, Paul David Dresselhaus, Alexandra E Curtin
Abstract: Superconducting electronics play an important role in quantum computation, ultra-low power electronics, voltage standards and magnetic sensors. Many of these applications rely on the microfabrication of superconducting circuits with multiple wiring l ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915387

50. Engineering three-body interaction and Pfaffian states in circuit QED systems
Topic: Physics
Published: 8/18/2014
Authors: Mohammad Hafezi, Prabin Adhikari, Jacob M Taylor
Abstract: We demonstrate a scheme to engineer the three-body interaction in circuit-QED systems by tuning a fluxonium qubit. Connecting such qubits in a square lattice and controlling the tunneling dynamics, in the form of a synthesized magnetic field, for th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914440



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