image: First bright soft X-ray narrow-linewidth combs of high order harmonics. 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: Tenio Popmintchev and Dimitar Popmintchev