In the Current Science magazine on-line
10 Oct 2014 Vol 346 issue 6205
Perspectives P165 /pg29
- under the heading: "Catching The Quantum Sound Wave",
Ruskov & Tahu mention....
"That light is composed of photons is made clear when a single atom is
shown to radiate one photon at a time." cited from Kimble, Degenais,
Mandel, Phys Rev Lett (1977).
I expect this will appeal to the "Light [i.e. E-M waves] is quantized"
band of enthusiasts.