Photon counting in the infrared with e-APD devices

J. L. Gach

doi:10.1117/12.2313322

20 July 2018 Photon counting in the infrared with e-APD devices

J. L. Gach

Proceedings Volume 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII; 1070916 (2018) https://doi.org/10.1117/12.2313322
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

Since the first photon counting systems in the visible, developped by Boksenberg and his collabortors in 1972, many groups around the world improved photon counting techniques. In the 2000's in the visible, EMCCDSs (electron multiplying charge coupled devices) allowed to replace the classical image intensifier photon counting systems by solid state devices and improved a lot the QE. But EMCCDs suffer from several issues, and the most important of them is the excess noise factor which prevents to know what is the exact incoming number pf photons in the case of multiple photons per pixel. In the infrared there was no equivalent to EMCCDs up to the development of e-APD sensors and cameras made with HgCdTe material (electron initiated avalanche photo diode). We will present the concepts of photon counting in the infrared with such devices and the main properties and advantages of infrared e-APDs compared to their visible counterpart, EMCCDs and the possibility to detect the photon energy (color) with such devices.

Conference Presentation

Citation Download Citation

J. L. Gach "Photon counting in the infrared with e-APD devices", Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 1070916 (20 July 2018); https://doi.org/10.1117/12.2313322

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