Single-photon may refer to:
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Photon counting
Photon counting is a technique in which individual photons are counted using a single-photon detector (SPD). A single-photon detector emits a pulse of signal for each detected photon. The counting efficiency is determined by the quantum efficienc ...
devices capable of counting individual photons, for example:
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Superconducting nanowire single-photon detectors
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Single-photon avalanche diode
A single-photon avalanche diode (SPAD), also called Geiger-mode avalanche photodiode (G-APD or GM-APD) is a solid-state photodetector within the same family as photodiodes and avalanche photodiodes (APDs), while also being fundamentally linked wi ...
s, a class of solid-state photodetectors
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Single-photon source
A single-photon source (also known as a single photon emitter) is a light source that emits light as single particles or photons. Single-photon sources are distinct from coherent light sources (lasers) and thermal light sources such as incandescent ...
s
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Single-photon emission computed tomography
Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomography, tomographic imaging technique using gamma rays. It is very similar to conventional nuclear medicine planar imaging using a gamma camera ...
, a nuclear medicine tomographic imaging technique
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