Dr. Ian R. Nemitz Profile

Dr. Ian R. Nemitz

at NASA Glenn Research Ctr

SPIE Involvement:

Author

Publications (4)

Proceedings Article | 13 March 2024 Presentation + Paper

Overview of NASA’s quantum metrology laboratory and quantum communications analysis suite for degenerate source verification and validation within aerospace network applications

Evan Katz, Adam Fallon, Yousef Chahine, Ian Chin, Ian Nemitz, Bryan Welch, John Lekki

Proceedings Volume 12911, 1291105 (2024) https://doi.org/10.1117/12.3009164

KEYWORDS: Quantum networks, Quantum measurement, Quantum entanglement, Quantum modeling, Quantum sources, Quantum channels, Quantum communications, Quantum processes

Read Abstract +

Proceedings Article | 4 March 2019 Paper

Bell inequality experiment for a high brightness time-energy entangled source

Ian Nemitz, Jonathan Dietz, Evan Katz, Brian Vynhalek, Benjamin Child, Bertram Floyd, John Lekki

Proceedings Volume 10902, 109021U (2019) https://doi.org/10.1117/12.2509849

KEYWORDS: Interferometers, Visibility, Single photon, Fiber optics, Mach-Zehnder interferometers, Photodetectors, Quantum communications, Particles, Single mode fibers, Waveguides

Read Abstract +

Proceedings Article | 4 March 2019 Paper

Studies on a time-energy entangled photon pair source and superconducting nanowire single-photon detectors for increased quantum system efficiency

Evan Katz, Benjamin Child, Ian Nemitz, Brian Vyhnalek, Tony Roberts, Andrew Hohne, Bertram Floyd, Jonathan Dietz, John Lekki

Proceedings Volume 10910, 1091015 (2019) https://doi.org/10.1117/12.2508736

KEYWORDS: Sensors, Nanowires, Silicon, Avalanche photodetectors, Photodetectors, Quantum efficiency, Single photon detectors, Superconductors, Time correlated photon counting, Signal to noise ratio

Read Abstract +

Time-energy entangled photon pairs are created by a system consisting of a 1064 nm pump diode laser that is fiber coupled to a high generation rate photon pair source. The source is a dual element periodically poled Magnesium Oxide doped Lithium Niobate (MgO:LN) waveguide that upconverts 1064 nm photons to single 532 nm photons in the first stage. In the second stage, the green photons are down converted to time-energy entangled photon pairs at 794 nm and 1614 nm. The output photon pairs are guided by fiber to sorting optics where they are separated and sent into high-efficiency photon detectors. In particular, the 1614 nm photons are detected by a superconducting nanowire with efficiency near 85% and dead time less than 30 ns. Detector output electrical signals are sent to a time tagger with bin resolution as narrow as 25 ps for coincidence counting. The ultimate goal of this setup is to demonstrate a single-source, high efficiency, high data rate, low noise, quantum communication system to enable Earth-space quantum networks. Test results that characterize the time-energy entangled photon pair creation rates of our source will be presented, via measures of accidental and true coincidence rates versus pump current. To reduce noise (accidentals) as much as possible, and for better understanding of our overall quantum system path-efficiency, studies of fluorescence caused by our pump’s 1064 nm and 532 nm photons will be investigated and discussed. Finally, characteristic measurements of our superconducting nanowire detector, such as dead time and detection efficiency versus electrical bias, will be offered. Please verify that (1) all pages are present, (2) all figures are correct, (3) all fonts and special characters are correct, and (4) all text and figures fit within the red margin lines shown on this review document. Complete formatting information is available at http://SPIE.org/manuscripts Return to the Manage Active Submissions page at http://spie.org/submissions/tasks.aspx and approve or disapprove this submission. Your manuscript will not be published without this approval. Please contact author_help@spie.org with any questions or concerns.

Proceedings Article | 29 January 2018 Paper

Coincidence studies of entangled photon pairs using nanowire detection and high-resolution time tagging for QKD application

Evan Katz, Nathaniel Wilson, Ian Nemitz, Sarah Tedder, Brian Vyhnalek, Bertram Floyd, Tony Roberts, Pushkar Pandit, Skyler Baugher, Roger Tokars, John Pouch, John Lekki

Proceedings Volume 10559, 1055905 (2018) https://doi.org/10.1117/12.2288474

KEYWORDS: Quantum efficiency, Sensors, Signal to noise ratio, Quantum key distribution, Photodetectors, Nanowires, Quantum communications, Picosecond phenomena

Read Abstract +

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years