We introduce extreme-ultraviolet high-harmonic generation from nanostructured silica. Generation inside micron and nanoscale sub-wavelength structures with periodic as well as aperiodic features leads to emission of structured extreme-ultraviolet pulses, useful for spectroscopy and imaging.

High-Harmonic Generation and EUV Science

Roscam Abbing, S., Zhang, Z.-Y., Kolkowski, R., Campi, F., Koenderink, F., & Kraus, P. (2021). Coherent diffractive extreme-ultraviolet generation from nanostructured silica. In Conference on Lasers and Electro-Optics, CLEO 2021. doi:10.1364/cleo_qels.2021.fm1o.4