Exploiting dark autoionizing states for enhancing extreme ultraviolet lasers

An international research team led by Professors Tsuneyuki Ozaki and François Légaré at the Institut national de la recherche scientifique (INRS), has developed a unique method to enhance the power of a laser source emitting extreme ultraviolet light pulses. The underlying mechanism of the newly observed phenomenon involves the unique role of dark-autoionizing states through coupling with other pertinent electronic states.