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	Author	Korneeva, Y.; Florya, I.; Semenov, A.; Korneev, A.; Goltsman, G.
	Title	New generation of nanowire NbN superconducting single-photon detector for mid-infrared			Type	Journal Article
	Year	2011	Publication	IEEE Trans. Appl. Supercond.	Abbreviated Journal	IEEE Trans. Appl. Supercond.
	Volume	21	Issue	3	Pages	323-326
	Keywords	SSPD
	Abstract	We present a break-through approach to mid-infrared single-photon detection based on nanowire NbN superconducting single-photon detectors (SSPD). Although SSPD became a mature technology for telecom wavelengths (1.3-1.55 μm) its further expansion to mid-infrared wavelength was hampered by low sensitivity above 2 μm. We managed to overcome this limit by reducing the nanowire width to 50 nm, while retaining high superconducting properties and connecting the wires in parallel to produce a voltage response of sufficient magnitude. The new device exhibits 10 times better quantum efficiency at 3.5 μm wavelength than the “standard” SSPD.
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	Notes				Approved	no
	Call Number	RPLAB @ gujma @			Serial	644
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