Single photon detected but not destroyed
First instrument built that can witness the passage of a light particle without absorbing it
By Andrew Grant, 13:53 PM November 7, 2013
Physicists have seen a single particle of light and then let it go on its way. The feat was possible thanks to a new technique that, for the first time, detects optical photons without destroying them. The technology could eventually offer perfect detection of photons, providing a boost to quantum communication and even biological imaging.
Plenty of commercially available instruments can identify individual light particles, but these instruments absorb the photons and use the energy to produce...
Source URL: https://www.sciencenews.org/article/single-photon-detected-not-destroyed