Micro-pixel Avalanche Photo Diodes (MAPD), the new wave in solid state detectors


MAPD Photo-Detectors

Zecotek has developed a new compact and cost effective photo-detector for low light detection that will phase out the bulky and expensive PMT’s (photo multiplier tubes) presently used in imaging applications such as PET imaging machines, Gamma cameras and high-energy, nuclear physics experiments.



Sensitive Area (mm^2)
Pixel Density (mm^-2)

Operating Voltage (V)
PDE (%)
Dark Current at (nA)
Dark Count (1 pe^-)(kHz/mm^2)
Rise Time (ns)
Fall Time (ns)
Duration [FWHM](ns)

3 x 3


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PET-iconHigh resolution PET scanners & PET-MRI

high-energyHigh-energy physics

LIDAR & Environmental Monitoring

securityHomeland security / Gamma Cameras

flowCompact Dosimeters / Flow Cytometry

The MAPD Advantage

The new Micro-pixel Avalanche Photo Diodes (MAPD) detect very small signals and can be readily used for photon counting. They feature extremely high gain typical of PMTs (~10^5) with the advantage of low operating voltage (-70V compared to – 1000 V for PMT). The all solid-state design makes MAPD detectors compact and insensitive to high magnetic fields.

Zecotek’s detectors incorporate our break-through technology that dramatically improves linearity and allow very tight timing resolution by providing fast pulse rise time and low jitter. Together with our new scintillation material LFS, Zecotek’s photo-detectors provide a powerful platform for medical imaging applications relying on gamma-ray detection, such as PET scanning, offering significant benefits to the industry.

  • “Zecotek provides LFS crystals required for the CMS experiment as they had the necessary energy resolution and radiation hardness . In using the thin LFS crystal plates Dr. Cox and his team were able to reduce the technical and cost risks associated with measurements in such experiments.”

    Professor Brad Cox
    Leader of the University of Virginia, CERN’s Compact Muon Solenoid experiment., University of Virginia
  • “Zecotek provided Cherry labs with a selection of scintillation crystals from their patented LFS-3 range. After preliminary testing Cherry labs found the crystals to have the fast decay constant they required, enhancing results for their depth-encoded PET detector designs. This combined with the competitive pricing Zecotek is able to offer made for an ideal solution.”

    Dr. Simon Cherry
    Head of Cherry Labs - UC Davis


 Very high gain ( -10^5 to 10^6 )
 High linearity
 low operating voltage ( -50 to 100V )
 Insensitive to magnetic field

 All solid-state compact & extremely reliable design
 High PDE ( 15-30% )
 Fast pulse rise time (-2ns)
 Low dark noise (<1Mhz / mm^2)