
Proceedings Paper
Spectral dependence of ultra-low dark count superconducting single photon detector for the evaluation of broadband parametric fluorescenceFormat | Member Price | Non-Member Price |
---|---|---|
$17.00 | $21.00 |
Paper Abstract
Superconducting nanowire single photon detectors (SNSPD) have unique characteristics of ultra low dark counts and
wide spectrum sensitivity. These natures are indispensable for the evaluation of ultra-broadband parametric fluorescence,
which are used for the quantum optical coherence tomography and novel optical non-linear experiments. Here we report
the spectral dependence of the detection efficiency of a meander type SNSPD device, having reduced strip width of 50 nm, over a wide spectrum range up to near infra-red wavelength. The fiber coupled, meander type device was
fabricated using 6 nm thick Niobium nitride (NbN) nanowires of reduced strip width, 50 nm, patterned over a MgO
substrate with active area of 10 x 10 μm2. A maximum efficiency of 32% at 500 nm, 30% at 600 nm, 16% at 800 nm,
10% at 1000 nm, and 1% at 1550 nm with the normalized bias current of 0.95 (bias 37 μA ) was observed at 4.2 K. The
salient feature of the device is, it exhibits a very low dark count rate (DCR) of only 2 Hz at the standard operating bias of
37 μA and ultra low DCR of 0.01Hz at 34 μA. Moreover, at this reduced bias with 0.01Hz DCR, the detection efficiency
is not appreciably decreased in the visible region (32% at 500 nm and 30% at 600 nm) and an order decrease is observed
(0.1%) at 1550 nm. The noise equivalent power (NEP) is of the order 10-19 WHz-1/2 in the visible region and 10-17 WHz-
1/2 in the near IR region. Ultra-broad band parametric fluorescence of band width from 791 nm to 1610 nm generated by
a quasi-phase matched (QPM) device was successfully detected with this SSPD.
Paper Details
Date Published: 20 January 2012
PDF: 7 pages
Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82681V (20 January 2012); doi: 10.1117/12.906534
Published in SPIE Proceedings Vol. 8268:
Quantum Sensing and Nanophotonic Devices IX
Manijeh Razeghi; Eric Tournie; Gail J. Brown, Editor(s)
PDF: 7 pages
Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82681V (20 January 2012); doi: 10.1117/12.906534
Show Author Affiliations
Shanthi Subashchandran, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Ryo Okamoto, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Akira Tanaka, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Masayuki Okano, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Labao Zhang, Nanjing Univ. (China)
Osaka Univ. (Japan)
Ryo Okamoto, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Akira Tanaka, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Masayuki Okano, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Labao Zhang, Nanjing Univ. (China)
Lin Kang, Nanjing Univ. (China)
Jian Chen, Nanjing Univ. (China)
Peiheng Wu, Nanjing Univ. (China)
Shigeki Takeuchi, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Jian Chen, Nanjing Univ. (China)
Peiheng Wu, Nanjing Univ. (China)
Shigeki Takeuchi, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Published in SPIE Proceedings Vol. 8268:
Quantum Sensing and Nanophotonic Devices IX
Manijeh Razeghi; Eric Tournie; Gail J. Brown, Editor(s)
© SPIE. Terms of Use
