Low noise superconducting single photon detectors on silicon

Dorenbos, S. N.; Reiger, E. M.; Perinetti, U.; Zwiller, V.; Zijlstra, T.; Klapwijk, T. M.
September 2008
Applied Physics Letters;9/29/2008, Vol. 93 Issue 13, p131101
Academic Journal
We have fabricated superconducting nanowire single photon detectors made of NbTiN on a silicon substrate. This type of material reduces the dark count rate by a factor of 10 compared to identical NbN detectors, enabling single photon detection with unprecedented signal to noise ratio: we report a noise equivalent power of 10-19 W Hz-1/2 at 4.2 K. The compatibility of our superconducting device with silicon enables its integration with complex structures.


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