The breakdown flash of Silicon Avalance Photodiodes - backdoor for eavesdropper attacks?
Christian Kurtsiefer, Patrick Zarda, Sonja Mayer, Harald Weinfurter
Abstract
Silicon avalanche photodiodes are the most sensitive photodetectors in the visible to near infrared region. However, when they are used for single photon detection in a Geiger mode, they are known to emit light on the controlled breakdown used to detect a photoelectron. This fluorescence light might have serious impacts on experimental applications like quantum cryptography or single-particle spectroscopy. We characterized the fluorescence behaviour of silicon avalanche photodiodes in the experimentally simple passive quenching configuration and discuss implications for their use in quantum cryptography systems.
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