Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 55: Poster Session: Superconductivity 2
TT 55.22: Poster
Mittwoch, 22. März 2017, 15:00–19:00, P2-OG3
Superconducting nanowire single-photon detectors with multi-photon resolution for integrated quantum photonics on GaAs — •Eric-René Reutter1,2, Ekkehart Schmidt1, Mario Schwartz3, Hannes Rotzinger2, Konstantin Ilin1, Michael Jetter3, Peter Michler3, Alexey V. Ustinov2, and Michael Siegel1 — 1Institut für Mikro- und Nanoelektronische Systeme (IMS), Karlsruher Institut für Technologie, Karlsruhe, Germany — 2Physikalisches Institut (PHI), Karlsruher Institut für Technologie, Karlsruhe, Germany — 3Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Universität Stuttgart, Stuttgart, Germany
Integrated quantum photonic devices are one of the most promising fields for future information processing technologies. Superconducting nanowire single-photon detectors (SNSPDs) can function as the perfect on-chip detection part, with low dark count and high event count rates, as well as picosecond timing resolution, high detection efficiency and excellent scalability. Their drawback is not having intrinsic energy and photon-number resolution (PNR). Quasi-PNR can be achieved using multi-pixel arrays in which SNSPDs are parallel shunted by resistors [1]. We have demonstrated quasi-PNR functionality of SNSPDs made of 4.9 nm thick and 100 nm wide NbN nanowires on GaAs. The detectors were shunted by 50-60 Ω palladium resistors forming 4-pixel arrays. We investigated multi-photon resolution capability of such detectors being excited by a fs-pulse NIR laser. Details on the dependence of the detector response on light intensity will be presented and discussed.
[1] S. Jahanmirinejad et al., Opt. Express 20 2012, 5017-5028