This microscope image shows green laser light shining from a single biological cell. (sciencemag.org)
Quick bursts of green laser light can erase print, without damaging or discoloring the paper. (scientificamerican.com)
When placed inside a ring of sapphire to concentrate the microwave energy, and illuminated by green laser light, the researchers found that the maser worked at room temperature and importantly, continuously. (sciencedaily.com)