From: "Sweetland, Gioia"
<gioia@seas.harvard.edu<mailto:gioia@seas.harvard.edu>>
Subject: [Seas-faculty] [Ee-seminars] EE Seminar on Friday, April 4 - Richard Mirin
Date: March 31, 2014 4:24:35 PM EDT
To: "ee-seminars@eecs.harvard.edu<mailto:ee-seminars@eecs.harvard.edu>"
<ee-seminars@eecs.harvard.edu<mailto:ee-seminars@eecs.harvard.edu>>
Cc: "Sweetland, Gioia"
<gioia@seas.harvard.edu<mailto:gioia@seas.harvard.edu>>
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Harvard EE Seminar Series
Friday, April 4, 2014
3:00-4:00 p.m.
Room 330
60 Oxford Street
Light Refreshments
Superconducting Single-Photon Detectors
Richard Mirin
National Institute of Standards and Technology
High-efficiency, low noise single-photon detectors are a key enabling technology for the
quantum optics and quantum information communities. Superconducting single-photon
detectors now surpass their semiconductor counterparts in most important metrics. I will
discuss my group’s research on two different types of superconducting single-photon
detectors and various experiments in quantum optics that require these high-efficiency
detectors. Transition edge sensors (TESs) formed from thin tungsten films have
demonstrated 98% system detection efficiency, with a dark count rate around 10 Hz, at a
wavelength of 1550 nm. The TESs are also capable of photon-number resolution, which is
important for generating various quantum states of light, such as cat states formed by
photon subtraction. Superconducting nanowire single-photon detectors (SNSPDs) formed from
tungsten silicide have recently demonstrated 93% system detection efficiency at 1550 nm,
with a dark count rate of ~ 1Hz, timing jitter of ~150 ps, and reset time of 40 ns. We
have assembled an 8-channel system with all devices having > 85% system detection
efficiency for multiphoton correlation measurements. Such a system can be used for rapid
joint spectral distribution measurements from a spontaneous parametric downconversion
source of correlated photon pairs. I will also discuss recent progress on integrating
these detectors with chip-scale waveguides as a step towards on-chip quantum photonics,
small arrays of SNSPDs, and progress towards loophole-free Bell inequality measurements
with entangled photon pairs.
Bio: : Dr. Mirin has a BS in Electrical Engineering from UC Berkeley and a PhD in
Electrical Engineering from UC Santa Barbara. Since 1996 he has been working at the
National Institute of Standards and Technology (NIST) in Boulder, Colorado. He is
currently the Group Leader of the Optoelectronics Manufacturing Group as well as the
Project Leader of the Nanostructure Fabrication and Modeling project in that group. His
main research interests are superconducting single-photon detectors, quantum optics and
information, III-V semiconductor growth with molecular beam epitaxy, and single quantum
dot single-photon sources.
Host: Evelyn Hu
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