Rise time of voltage pulses in NbN superconducting single photon detectors

We have found experimentally that the rise time of voltage pulse in NbN superconducting single photon detectors increases nonlinearly with increasing the length of the detector L. The effect is connected with dependence of resistance of the detector Rn, which appears after photon absorption, on its...

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Bibliographic Details
Published in:Applied physics letters 2016-08, Vol.109 (5)
Main Authors: Smirnov, K. V., Divochiy, A. V., Vakhtomin, Yu. B., Sidorova, M. V., Karpova, U. V., Morozov, P. V., Seleznev, V. A., Zotova, A. N., Vodolazov, D. Yu
Format: Article
Language:English
Subjects:
ABSORPTION
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Dependence
Detectors
ELECTRIC POTENTIAL
INDUCTANCE
LENGTH
Niobium nitride
NIOBIUM NITRIDES
NONLINEAR PROBLEMS
Photon absorption
PHOTONS
PULSE RISE TIME
PULSES
Quantum theory
Sensors
SUPERCONDUCTING DEVICES
Superconductivity
Voltage pulses
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Summary:We have found experimentally that the rise time of voltage pulse in NbN superconducting single photon detectors increases nonlinearly with increasing the length of the detector L. The effect is connected with dependence of resistance of the detector Rn, which appears after photon absorption, on its kinetic inductance Lk and, hence, on the length of the detector. This conclusion is confirmed by our calculations in the framework of two temperature model.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4960533