16 September 2015 Ultrafast superconducting single-photon detector with a reduced active area coupled to a tapered lensed single-mode fiber
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J. of Nanophotonics, 9(1), 093051 (2015). doi:10.1117/1.JNP.9.093051
Abstract
This paper presents an ultrafast niobium nitride (NbN) superconducting single-photon detector (SSPD) with an active area of 3×3  μm2 that offers better timing performance metrics than the previous SSPD with an active area of 7×7  μm2. The improved SSPD demonstrates a record timing jitter (<25  ps), an ultrashort recovery time (<2  ns), an extremely low dark count rate, and a high detection efficiency in a wide spectral range from visible part to near infrared. The record parameters were obtained due to the development of a new technique providing effective optical coupling between a detector with a reduced active area and a standard single-mode telecommunication fiber. The advantages of the new approach are experimentally confirmed by taking electro-optical measurements.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Maria V. Sidorova, Alexander V. Divochiy, Yury B. Vakhtomin, Konstantin V. Smirnov, "Ultrafast superconducting single-photon detector with a reduced active area coupled to a tapered lensed single-mode fiber," Journal of Nanophotonics 9(1), 093051 (16 September 2015). http://dx.doi.org/10.1117/1.JNP.9.093051
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KEYWORDS
Sensors

Superconductors

Single photon detectors

Ultrafast phenomena

Beam splitters

Inductance

Active optics

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