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Proceedings Paper

Ultra-high cell-density silicon photomultipliers with high detection efficiency
Author(s): Fabio Acerbi; Alberto Gola; Veronica Regazzoni; Giovanni Paternoster; Giacomo Borghi; Claudio Piemonte; Nicola Zorzi
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Paper Abstract

Silicon photomultipliers (SiPMs) are arrays of many single-photon avalanche diodes (SPADs), all connected in parallel. Each SPAD is sensitive to single photons and the SiPM gives an output proportional to the number of detected photons. These sensors are becoming more and more popular in different applications, from high-energy physics to spectroscopy, and they have been significantly improved over last years, decreasing the noise, increasing the cell fill-factor (FF) and thus achieving very high photon-detection efficiency (PDE). In FBK (Trento, Italy), we developed new SiPM technologies with high-density (HD) and, more recently, ultra-high-density (UHD) of cells (i.e. density of SPADs). These technologies employ deep-trenches between cells, for electrical and optical isolation. As an extreme case the smallest-cell, SiPM, i.e. with 5μm cell pitch, has about 40000 SPADs per squared millimeter. Such small SPAD dimensions gives a significantly high dynamic range to the SiPM. These small-cells SiPM have a lower correlated noise (including lower afterpulsing probability) and a faster recharge time (in the order of few nanoseconds), and they also preserve a very good detection efficiency (despite the small SPAD dimension).

Paper Details

Date Published: 1 May 2017
PDF: 6 pages
Proc. SPIE 10212, Advanced Photon Counting Techniques XI, 102120I (1 May 2017); doi: 10.1117/12.2261966
Show Author Affiliations
Fabio Acerbi, Fondazione Bruno Kessler (Italy)
Alberto Gola, Fondazione Bruno Kessler (Italy)
Veronica Regazzoni, Fondazione Bruno Kessler (Italy)
Giovanni Paternoster, Fondazione Bruno Kessler (Italy)
Giacomo Borghi, Fondazione Bruno Kessler (Italy)
Claudio Piemonte, Fondazione Bruno Kessler (Italy)
Nicola Zorzi, Fondazione Bruno Kessler (Italy)


Published in SPIE Proceedings Vol. 10212:
Advanced Photon Counting Techniques XI
Mark A. Itzler; Joe C. Campbell, Editor(s)

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