This was the paper in which he proposed that light is concentrated in traveling energy packets, which later came to be called photons. (discovermagazine.com)
Thermal disturbances at such low temperatures are so weak that the research team could detect energy packets of only a single zeptojoule. (sciencedaily.com)
Using a specially built microscope capable of imaging matter at the atomic scale, the researchers were able to visualize traps, which can adversely affect the flow of electrons and elementary energy packets called excitons. (sciencedaily.com)