SILICON PHOTOMULTIPLIER AND RADIATION DETECTOR

摘要

The invention relates to a silicon photomultiplier (20; 20'; 20''; 62) with a silicon chip (22) comprising an array of microcells (21), wherein the microcells (21) form photon-sensitive active areas (23), each surrounded by photon-insensitive inactive areas (24). At least one elevated, three-dimensional light concentrating structure (27; 27'; 27''; 63) is located directly on top of the Silicon chip (22) within an inactive area (24) and configured such that photons that would have hit an inactive area (24) are redirected towards an active area (23). The light concentrating structure does lead to increased detection efficiency. The inventive SiPM is usable in areas like medical imaging (e.g. PET, SPECT, CT and other X-ray detectors) as well as astrophysics, high-energy physics and other analytics applications.