Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Poster Session Superconductivity
TT 12.4: Poster
Montag, 11. März 2013, 15:00–19:00, Poster D
Superconducting nanowire single-photon detectors (SNSPDs) on SOI for near-infrared range — •Philipp Trojan1, Konstantin Ilin1, Dagmar Henrich1, Matthias Hofherr1, Steffen Dörner1, Alexey Semenov2, Heinz-Wilhelm Huebers2,3, and Michael Siegel1 — 1Institut für Mikro- und Nanoelektronische Systeme (IMS), Karlsruher Institut für Technologie (KIT) — 2Institut für Planetenforschung, DLR, Berlin-Adlershof — 3Institut für Optik und Atomare Physik, Technische Universität Berlin
Superconducting nanowire single-photon detectors are promising devices for photon detectors with high count rates, low dark count rates and low dead times. At wavelengths beyond the visible range, the detection efficiency of today's SNSPDs drops significantly. Moreover, the low absorption in ultra-thin detector films is a limiting factor over the entire spectral range.
Solving this problem requires approaches for an enhancement of the absorption range in feeding the light to the detector element.
A possibility to obtain a better absorption is the use of multilayer substrate materials for photonic waveguide structures.
We present results on development of superconducting nanowire single-photon detectors made from niobium nitride on silicon-on-insulator (SOI) multilayer substrates. Optical and superconducting properties of SNSPDs on SOI will be discussed and compared with the characteristics of detectors on common substrates.