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Proceedings Paper

Floating field ring technique applied to enhance fill factor of silicon photomultiplier elementary cell
Author(s): L. Maresca; M. De Laurentis; M. Riccio; A. Irace; G. Breglio
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Paper Abstract

A silicon photomultiplier (SiPM) is a matrix of Geiger-mode avalanche photodiodes (GM-APDs) connected in parallel. One of the main drawback in the SiPm is the low Photon Detection Efficiency(PDE) also due to the low geometrical fill factor of the microcells array. This paper reports on the analysis and simulation of the single floating field ring technique, applied to the junction termination of the single cell of a Silicon Photomultiplier (SiPm). A floating guard ring is made along the border of the single microcell and it is not connected to the cathodic contact. Even if the ring is not electrically connected to the main junction, it mitigates the variation of the electrical field at the main termination. The effect of the junction-to-ring distance is analytically investigated by using cylindrical coordinates and an optimal distance together with the optimal width is found. Results show that the single floating ring reduces the junction edge electric field by keeping constant the size of the microcell allowing, then, an improvement for the geometrical fill factor. Results are supported by TCAD simulations.

Paper Details

Date Published: 6 May 2011
PDF: 7 pages
Proc. SPIE 8072, Photon Counting Applications, Quantum Optics, and Quantum Information Transfer and Processing III, 807208 (6 May 2011); doi: 10.1117/12.886803
Show Author Affiliations
L. Maresca, Univ. degli Studi di Napoli Federico II (Italy)
M. De Laurentis, Univ. degli Studi di Napoli Federico II (Italy)
M. Riccio, Univ. degli Studi di Napoli Federico II (Italy)
A. Irace, Univ. degli Studi di Napoli Federico II (Italy)
G. Breglio, Univ. degli Studi di Napoli Federico II (Italy)


Published in SPIE Proceedings Vol. 8072:
Photon Counting Applications, Quantum Optics, and Quantum Information Transfer and Processing III
Jaromír Fiurásek; Ivan Prochazka, Editor(s)

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