Physics – Quantum Physics
Scientific paper
2010-12-19
Physics
Quantum Physics
This article has been withdrawn to comply to the editorial policy on prior publication of a journal
Scientific paper
Superconducting nanowire single-photon detectors (SNSPDs) perform single-photon counting with exceptional sensitivity and time resolution at near-infrared wavelengths. State-of-the-art SNSPDs, based on 100 nm-wide, 4 to 5 nm thick NbN nanowires, are vulnerable to constrictions, which significantly limit their yield. Also, their sensitivity becomes negligible beyond 2 \mu m wavelength, which makes them unsuitable for mid-infrared applications. SNSPDs based on few-tens-of-nanometer-wide nanowires are expected to efficiently detect mid-infrared photons and to operate at low bias currents, so constrictions may have less impact on their performance. Prior to this work, SNSPDs based on nanowires narrower than 50-nm had not been demonstrated because: (1) the SNSPD signal is roughly proportional to the nanowire width, so narrow nanowires have poor signal-to-noise ratio; and (2) fabrication at these length scales is extremely challenging. In this letter we report how we addressed these issues and demonstrated single-photon detection (20% detection efficiency at 1550 nm wavelength) with 30- and 20-nm-wide-nanowire detectors.
Bellei F.
Berggren Karl K.
Csete M. C.
Dauler Eric
Hu Xiao
No associations
LandOfFree
Single-photon detectors based on ultra-narrow superconducting nanowires does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Single-photon detectors based on ultra-narrow superconducting nanowires, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single-photon detectors based on ultra-narrow superconducting nanowires will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-725509