Technology

Principle

An incoming photon is directly converted into an electrical charge using a detection material such as silicon, gallium arsenide or cadmium telluride. This charge is proportional to the energy of the incoming photon: this is quantum detection.
The resulting charge is collected on each pixels by the way of a Read Out Integrated Component that will count each individual charge that reach a threshold .

Technology benefits  :

Accurate counting : only detected photons or charged particle (electrons or protons) are counted, the electronic noise is totaly eliminated.
Energy Discrimination : the threshold allows for the descimination of Photons based on their energy.
Counting dynamic : The counting dynamic range  is almost limiteless
High Acquisition Rate : This technology is designed to handle
high acquisition rates, reaching frequencies of about kHz.