image: (Top) Infrared lasers produce long pulses of what is essentially white X-ray light containing many wavelengths. (Bottom) In contrast, UV lasers produce laser-like short pulses of X-rays. This material relates to a paper that appeared in the Dec. 4, 2015, issue of Science, published by AAAS. The paper, by D. Popmintchev at Joint Institute for Lab Astrophysics (JILA) in Boulder, CO, and colleagues was titled, 'Ultraviolet surprise: Efficient soft x-ray high-harmonic generation in multiply ionized plasmas.' view more
Credit: Kapteyn-Murnane Group and Steven Burrows