We report the performance of a germanium quad-cell, composed of four avalanche photodiodes operated in the photon-counting regime, biased above the breakdown voltage. Each pixel detects a single photon in the wavelength range 1–1.5 µm with ~10% quantum efficiency and measures the photon arrival time with a time resolution of 100 ps. By adopting a multiplexed gating of the avalanche photodiodes we avoided the optical cross talk among pixels, thus achieving a noise-equivalent power of 3 × 10-15 W/Hz½ for each pixel and demonstrating the tracking capabilities of such a detector.

Counting, timing and tracking with a single-photon germanium detector

ZAPPA, FRANCO;LACAITA, ANDREA LEONARDO;COVA, SERGIO;
1996

Abstract

We report the performance of a germanium quad-cell, composed of four avalanche photodiodes operated in the photon-counting regime, biased above the breakdown voltage. Each pixel detects a single photon in the wavelength range 1–1.5 µm with ~10% quantum efficiency and measures the photon arrival time with a time resolution of 100 ps. By adopting a multiplexed gating of the avalanche photodiodes we avoided the optical cross talk among pixels, thus achieving a noise-equivalent power of 3 × 10-15 W/Hz½ for each pixel and demonstrating the tracking capabilities of such a detector.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/559535
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