Quantum emitters: Beyond crystal clear to single-photon
pure

Photons, fundamental particles of light, are carrying
these words to your eyes via the light from your computer screen or
phone. Photons play a key role in the next-generation quantum
information technology, such as quantum computing and
communications. A quantum emitter, capable of producing a single,
pure photon, is the crux of such technology but has many issues
that have yet to be solved, according to KAIST
researchers.