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Devices
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Photodiode
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Photovoltaic
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p-i-n photodiode
----------------

Pinned Photodiode
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https://www.mdpi.com/1424-8220/23/21/8847

Photogate
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Avalanche Photo Diode (APD)
---------------------------

Single Photon Avalanche Diode (SPAD)
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Silicon Photomultipliers (SiPMs)
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.. https://hub.hamamatsu.com/us/en/technical-notes/mppc-sipms/what-is-an-SiPM-and-how-does-it-work.html