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The Photonic Quantum Stack — Lasers, Modulators & Single-Photon Detectors · The Picks & Shovels of Quantum — Fridges, Lasers & Helium-3

6965.T

Hamamatsu Photonics
Foreign listing — not directly tradable in a US brokerage. Editorial detail only.

Dominant single-photon detectors (SPADs, SNSPDs) and PMTs. The default detector for photonic-quantum and quantum-key-distribution.

What they do

Japan-listed. Dominant supplier of single-photon avalanche diodes (SPADs), superconducting nanowire single-photon detectors (SNSPDs), and photomultiplier tubes (PMTs) . These are the only detectors that can count individual photons — required for photonic quantum computing, quantum key distribution, low-light scientific imaging, and LIDAR. Near-monopoly in single-photon detection. Quantum-specific exposure that you can't get any other way as a public investor.