Print Email Facebook Twitter Superconducting detector dynamics studied by quantum pump-probe spectroscopy Title Superconducting detector dynamics studied by quantum pump-probe spectroscopy Author Heeres, R.W. Zwiller, V. Faculty Applied Sciences Department Quantum Nanoscience Date 2012-09-11 Abstract We explore the dynamics of superconducting single-photon detectors (SSPDs) on the picosecond time-scale using a correlated photon-pair source based on spontaneous parametric downconversion (SPDC), corresponding to a pump-probe experiment at the single-photon level. We show that the detector can operate in a regime where the two-photon detection probability is orders of magnitude larger than the single-photon detection probability. The characteristic relaxation time-scale of the out-of-equilibrium hot-spot is found to be ? 15?ps. Our measurement technique is an effective tool to study fast two-photon processes, without requiring a power-dependence measurements to determine the number of photons involved. Subject superconducting photodetectorstwo-photon processes To reference this document use: http://resolver.tudelft.nl/uuid:2e97d85b-7779-4391-af3a-8916e9aecdae DOI https://doi.org/10.1063/1.4750139 Publisher American Institute of Physics ISSN 0003-6951 Source http://apl.aip.org/resource/1/applab/v101/i11/p112603_s1 Source Applied Physics Letters, 101 (11), 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 American Institute of Physics Files PDF Heeres_2012.pdf 750.19 KB Close viewer /islandora/object/uuid:2e97d85b-7779-4391-af3a-8916e9aecdae/datastream/OBJ/view