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Metrology

Optical/photometry/laser metrology

Patents

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The device reprinted from Z. H. Levine et al., Sensors 25 (17) 5470 (2025).

Metrological Photon Counter and Metrologically Counting Photons at Room Temperature

NIST Inventors

Zachary H. Levine , Neil M. Zimmerman , Alan Migdall and Joshua Bienfang

A gated few-photon pulse enters the device and is converted to electron-hole pairs through photoabsorption. Electric fields lead to the separation of the electron-hole pairs. The electrons are taken to an electronically defined well near a field-effect transistor. (The holes are discarded through a

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