We report on the compressive near infrared single-pixel imaging using the sinusoidally gated InGaAs/InP single-photon avalanche diode (SG-SPAD). The SG-SPAD is one of the most efficient and practical single-photon detector in NIR region, and it enable us to realize an imaging with an extremely low number of photons. We successfully took 2- dimensional 64 × 64 images of a transparent object with an entire photon detection events of 105.
We have demonstrated the surface plasmon-polariton interference using a long-range surface plasmon-polariton
waveguide coupler. A clear interference fringe with the visibility of 87 % was observed. The coupling ratio of the
waveguide coupler was estimated to be 64:36 by two-photon interference experiments.
We report an ultra-low-noise single-photon detection at 1550nm using a 1-GHz sinusoidally gated InGaAs/InP avalanche
photodiode. The avalanche photodiode was operated in a low temperature regime ( > 183 K) which can be achieved by a
simple electrical cooling system. At 183 K, the dark count probability can be reduced to 2.0×10-7 with a detection
efficiency of 9.6 %, while the afterpulsing probability remained at a low value (3 %).
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