Dr. Philippe Bérard Profile

Dr. Philippe Bérard

at Excelitas Technologies

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PROCEEDINGS ARTICLE | March 11, 2013

Characterization of an SiPM dedicated at analytical, life science, and medical imaging

Proc. SPIE. 8621, Optical Components and Materials X

KEYWORDS: Photodetectors, Sensors, Quantum efficiency, Single photon, Life sciences, Medical imaging, Capacitance, Picosecond phenomena, Silicon photomultipliers, Positron emission tomography

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Silicon photomultipliers with high photon detection efficiency in the 350 to 800 nm range and low dark count rate are currently being developed in a variety of geometry, microcell size and area in order to address the needs of the analytical, life science, medical imaging community as well as for various scientific and technological applications. This SiPM development platform is based on previous knowledge of low dark count avalanche photodiode operated in Geiger-mode found in the Excelitas single photon counting module. Low dark counts and low temperature sensitivity are especially important when tiling up SiPMs to form larger area detectors such as block detectors typically used in positron emission tomography. The latest developments include; 1. Optical trenches to suppress crosstalk which allowed to increase the operating voltage range from 5 to 10 V above breakdown, 2. Tailored parasitic capacitance to obtain single photon timing resolution close to 200 ps FWHM and 3. Improved PDE at shorter wavelengths by optimizing the entrance window. A corrected energy resolution of 12.0 % was typically obtained at 511 keV which, alongside the good timing resolution, makes this SiPM a perfect candidate for time-of-flight PET and other application requiring a timing resolution better than 200 ps.

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