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| Paper: |
Recent Characterization Results of LmAPDs: Towards Photon Counting Infrared Arrays for HWO |
| Monograph: |
11, HWO25 Proceedings Part II: Mission Framework, Technology, and Broader Contributions |
| Page: |
345 |
| Authors: |
Guillaume Huber, Michael Bottom, Shane Jacobson, Charles-Antoine Claveau, Ian Baker, and Pavaman Bilgi |
| DOI: |
10.26624/RQGZ8936 |
| Abstract: |
HWO's goal of performing spectroscopy of Earth-like exoplanets sets unprecedented requirements for detectors, with each pixel expected to detect only a handful of photons per hour. Linear-mode avalanche photodiodes (LmAPDs) are a candidate for the observatory's infrared channel. In recent years, they have demonstrated negligible dark-current and sub-electron effective readout noise, possibly enabling photon counting operation. In this paper, we present recent advances in the development of science-grade 1k×1k LmAPDs, illustrating their potential for HWO while also discussing new challenges identified through ongoing work. In particular, we focus on glow and persistence, which represent challenges that must be addressed to allow these detectors to reach their full potential. |
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