TY - JOUR
T1 - Superconducting nanowires connected in series for photon number resolving functionality
AU - Mattioli, F.
AU - Jahanmirinejad, S.
AU - Zhou, Z.
AU - Gaggero, A.
AU - Frucci, G.
AU - Sahin, D.
AU - Leoni, R.
AU - Fiore, A.
PY - 2014
Y1 - 2014
N2 - The experimental demonstration of a superconducting photon-number-resolving detector, based on the series connection of N superconducting nanowires, is presented. An integrated resistor is connected in parallel to each section of the device that provides in this way a single voltage-readout, proportional to the number of photons detected in distinct nanowires. As a proof of principle a four element detector has been fabricated from an NbN film on a GaAs substrate and fully characterized. Clearly separated output levels corresponding to the detection of n = 1-4 photons are observed achieving a single-photon system quantum efficiency of 2.6% at λ=1.3 μm. In order to demonstrate the potential scalability of the series-nanowire detector to a larger number of photons, we report our preliminary results in the characterization of detectors fabricated with 8 and 12 pixels. Clear evidence of n= 1-8 photon absorption in the 8-pixel detector has been achieved.
AB - The experimental demonstration of a superconducting photon-number-resolving detector, based on the series connection of N superconducting nanowires, is presented. An integrated resistor is connected in parallel to each section of the device that provides in this way a single voltage-readout, proportional to the number of photons detected in distinct nanowires. As a proof of principle a four element detector has been fabricated from an NbN film on a GaAs substrate and fully characterized. Clearly separated output levels corresponding to the detection of n = 1-4 photons are observed achieving a single-photon system quantum efficiency of 2.6% at λ=1.3 μm. In order to demonstrate the potential scalability of the series-nanowire detector to a larger number of photons, we report our preliminary results in the characterization of detectors fabricated with 8 and 12 pixels. Clear evidence of n= 1-8 photon absorption in the 8-pixel detector has been achieved.
UR - http://www.scopus.com/inward/record.url?scp=84902246876&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/507/4/042024
DO - 10.1088/1742-6596/507/4/042024
M3 - Article (Academic Journal)
AN - SCOPUS:84902246876
SN - 1742-6588
VL - 507
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - PART 4
M1 - 042024
ER -