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Search Publications by: Rob Horansky (Fed)

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Displaying 51 - 75 of 114

Verification of Calibration Methods for Determining Photon-Counting Detection Efficiency using Superconducting Nano-Wire Single Photon Detectors

September 4, 2017
Author(s)
Igor Vayshenker, Robert D. Horansky, John H. Lehman, Malcolm G. White, Sae Woo Nam, Ingmar Mueller, Lutz Werner, G. Wuebbeler
In the recent years several ways to radiometrically calibrate optical fiber-coupled detectors have been developed. However, fiber-coupled calibration methods for single photon detectors have not been compared by national metrology institutes validating the

Measurement Challenges for 5G and Beyond

July 14, 2017
Author(s)
Catherine A. Remley, Jeffrey A. Jargon, Joshua A. Gordon, Alexandra E. Curtin, David R. Novotny, Christopher L. Holloway, Robert D. Horansky, Michael S. Allman, Jeanne T. Quimby, Camillo A. Gentile, Peter B. Papazian, Ruoyu Sun, Damir Senic, Jelena Senic, Matthew T. Simons, Maria G. Becker, Dylan F. Williams, Richard A. Chamberlin, Jerome G. Cheron, Ari D. Feldman, Paul D. Hale, Mohit S. Mujumdar, Nada T. Golmie
National Metrology Institutes (NMIs) around the world are charged with supporting industry through improved measurement science and by providing a traceability path to fundamental physical standards. Mobile wireless communications have become a ubiquitous

Hotspot Relaxation Dynamics in a Current Carrying Superconductor

March 17, 2016
Author(s)
Francesco Marsili, Martin Stevens, Alex Kozorezov, Varun Verma, Colin Lambert, Jeffrey A. Stern, Rob Horansky, Shellee D. Dyer, Shannon Duff, David P. Pappas, Matthew Shaw, Richard Mirin, Sae Woo Nam
When a photon is absorbed in a superconductor it creates a region of nonequilibrium superconductivity referred to as a hotspot [1]. The operation of most superconducting single photon detectors (microwave kinetic inductance detectors, MKIDs [2,3]

High-efficiency superconducting nanowire single-photon detectors fabricated from MoSi thin-films

December 22, 2015
Author(s)
Varun B. Verma, Boris Korzh, Felix Bussieres, Robert D. Horansky, Shellee D. Dyer, Adriana E. Lita, Igor Vayshenker, Francesco Marsili, Matthew D. Shaw, Hugo Zbinden, Richard P. Mirin, Sae Woo Nam
We report on MoSi SNSPDs which achieved high system detection efficiency (87.1 ± 0.5% at 1542 nm) at 0.7 K and we demonstrate that these detectors can also be operated with saturated internal efficiency at a temperature of 2.3 K in a Gifford-McMahon

Quasiparticle recombination in hotspots in superconducting current-carrying nanowires

August 6, 2015
Author(s)
Alex Kozorezov, Colin Lambert, Francesco Marsili, Martin Stevens, Varun Verma, Jeffrey A. Stern, Rob Horansky, Shellee D. Dyer, Shannon Duff, David P. Pappas, Adriana Lita, Matthew D. Shaw, Richard Mirin, Sae Woo Nam
We describe a kinetic model of recombination of nonequilibrium quasiparticles generated by single photon absorption in superconducting current-carrying nanowires. The model is developed to interpret two-photon detection experiments in which a single photon

A near-infrared 64-pixel superconducting nanowire single photon detector array with integrated multiplexed readout

May 14, 2015
Author(s)
Michael S. Allman, Varun B. Verma, Martin J. Stevens, Thomas Gerrits, Robert D. Horansky, Adriana E. Lita, Francesco Marsili, A. Beyer, Matthew Shaw, D. Kumor, Richard P. Mirin, Sae Woo Nam
We demonstrate a 64-pixel free-space-coupled array of superconducting nanowire single photon detectors optimized for high detection efficiency in the near-infrared range. An integrated, readily scalable, multiplexed readout scheme is employed to reduce the

High-efficiency superconducting nanowire single-photon detectors fabricated from MoSi thin-films

April 10, 2015
Author(s)
Varun B. Verma, Boris Korzh, Felix Bussieres, Robert D. Horansky, Shellee D. Dyer, Adriana E. Lita, Igor Vayshenker, Francesco Marsili, Matthew D. Shaw, Hugo Zbinden, Richard P. Mirin, Sae Woo Nam
We demonstrate high-efficiency superconducting nanowire single-photon detectors (SNSPDs) fabricated from MoSi thin-films. We measure a maximum system detection efficiency (SDE) of 87 ± 0.5 % at 1542 nm at a temperature of 0.7 K, with a jitter of 76 ps

Photon-efficient high-dimensional quantum key distribution

February 4, 2015
Author(s)
Tian Zhong, Hongchao Zhou, Rob Horansky, Catherine Lee, Varun Verma, Adriana Lita, Alessandro Restelli, Joshua Bienfang, Richard Mirin, Thomas Gerrits, Sae Woo Nam, Francesco Marsili, Zhenshen Zhang, Ligong Wang, Dirk Englund, Gregory Wornell, Jeffrey Shapiro, Franco N. Wong
Quantum key distribution (QKD) is a secure communication technology whose security is guaranteed by the laws of physics. However, its widespread use has been hindered in part by low secure-key throughput due to the inherent loss and de-coherence of photons

Materials Development for High Efficiency Superconducting Nanowire Single-Photon Detectors

January 1, 2015
Author(s)
Adriana E. Lita, Varun B. Verma, Robert D. Horansky, Jeffrey M. Shainline, Richard P. Mirin, Sae Woo Nam
Superconducting nanowire single-photon detectors (SNSPDs) based on ultra-thin films have become the preferred technology for applications that require high efficiency single-photon detectors with high speed, high timing resolution, and low dark count rates

Entanglement-based quantum communication secured by nonlocal dispersion cancellation

December 22, 2014
Author(s)
Catherine Lee, Zheshen Zhang, Greg Steinbrecher, Hongchao Zhou, Jacob Mower, Tian Zhong, Ligong Wang, Rob Horansky, Varun Verma, Richard Mirin, Francesco Marsili, Matthew Shaw, Sae Woo Nam, Gregory Wornell, Franco N. Wong, Jeffrey Shapiro, Dirk Englund
The principles of quantum mechanics enable new applications that address unsolved problems in communications, computation, and precision measurement. Quantum key distribution (QKD) enables participants to amplify secure information over long distances with

High-efficiency WSi superconducting nanowire single-photon detectors operating at 2.5 K

September 24, 2014
Author(s)
Varun B. Verma, Boris Korzh, Felix Bussieres, Robert D. Horansky, Adriana E. Lita, Francesco Marsili, Hugo Zbinden, Richard P. Mirin, Sae Woo Nam
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 temperature

Photon-Efficient High-Dimensional Quantum Key Distribution

June 12, 2014
Author(s)
Tian Zhong, Hongchao Zhou, Ligong Wang, Gregory Wornell, Zheshen Zhang, Jeffrey Shapiro, Franco N. Wong, Rob Horansky, Varun Verma, Adriana Lita, Richard Mirin, Thomas Gerrits, Sae Woo Nam, Alessandro Restelli, Joshua Bienfang, Francesco Marsili, Matthew Shaw
We demonstrate two high-dimensional QKD protocols - secure against collective Gaussian attacks - yielding up to 8.6 secure bits per photon and 6.7 Mb/s throughput, with 6.9 bits per photon after transmission through 20 km of fiber.

A four-pixel single-photon pulse-position array fabricated from WSi superconducting nanowire single- photon detectors

February 3, 2014
Author(s)
Varun B. Verma, Robert D. Horansky, Francesco Marsili, Jeffrey Stern, Matthew Shaw, Adriana E. Lita, Richard P. Mirin, Sae Woo Nam
We demonstrate a scalable readout scheme for an infrared single-photon pulse-position camera consisting of WSi superconducting nanowire single-photon detectors. For an N × N array, only 2 × N wires are required to obtain the position of a detection event