New Quantum Dot Transistor Counts Individual Photons

A transistor containing quantum dots that can count individual photons (the smallest particles of light) has been designed and demonstrated at the National Institute of Standards and Technology (NIST). The semiconductor could be integrated easily into electronics and able to operate at higher temperatures than other single-photon detectors. Offering a practical advantage such as quantum key distribution (QKD) for “unbreakable” encryption using single photons.