27 Jan 2021 Share:
Researchers have found a way to effectively squeeze extreme-ultraviolet (XUV) wavelengths from white light. The team s new method compresses the spectral width of broadband visible white light combined with vacuum-ultraviolet (VUV) to generate narrowband laser pulses within the extreme-ultraviolet (XUV) range.
Fig. 1: (a) A specific colour can be selected from a broadband light source using e.g. a prism or a grating. This comes, however, at the expense of losing most of the light. (b) By applying a nonlinear optical technique such as four-wave mixing in krypton, it is possible to generate a specific colour using all the available light at different colours.