Robuta

https://www.xray.physik.uni-muenchen.de/research/hhg_xray_source/index.html
high harmonic generationx rayexperimental physicssoftsource
https://en.wikipedia.org/wiki/High-harmonic_generation
high harmonic generationwikipedia
https://www.arxiv.org/abs/1404.6242
Abstract page for arXiv paper 1404.6242: Spin conservation in high-order-harmonic generation using bicircular fields
harmonic generationspinconservationhighorder