We have combined this microscope with new fluorescent probes, which switch between a bright and dark state rapidly. (sciencedaily.com)
The sorry state of research into one of the world's biggest entertainment industries is leaving us in the dark (theguardian.com)
When photons of that frequency, emitted in a short pulse by a «probe» laser, hit the condensate, they trigger a quantum dark state. (scientificamerican.com)