This article reports a complete characterization of single photon avalanche diodes (SPADs) at temperatures down to 120 K. We show that deep cooling of the device by means of a compact liquid-nitrogen Dewar brings several advantages, such as extremely low dark counting rates (down to 1 counts/s), better time resolution, and higher quantum efficiency in the visible range. By using a special current pick-off circuit, we achieved a time resolution of 20 ps full width at half maximum at 120 K for a 50 μm diameter SPAD. Afterpulsing effects are avoided by using a sufficiently long hold-off time (microseconds).
Operation of silicon single photon avalanche diodes at cryogenic temperature
RECH, IVAN;LABANCA, IVAN GIUSEPPE;ARMELLINI, GIACOMO;GULINATTI, ANGELO;GHIONI, MASSIMO ANTONIO;COVA, SERGIO
2007-01-01
Abstract
This article reports a complete characterization of single photon avalanche diodes (SPADs) at temperatures down to 120 K. We show that deep cooling of the device by means of a compact liquid-nitrogen Dewar brings several advantages, such as extremely low dark counting rates (down to 1 counts/s), better time resolution, and higher quantum efficiency in the visible range. By using a special current pick-off circuit, we achieved a time resolution of 20 ps full width at half maximum at 120 K for a 50 μm diameter SPAD. Afterpulsing effects are avoided by using a sufficiently long hold-off time (microseconds).File in questo prodotto:
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