2026-04-17T02:07:17Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/204942025-07-17T03:38:11Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Serrat Jurado, Carles author 2013-09-24 We theoretically study the response of He atoms exposed simultaneously to an intense IR pulse and a weak extreme ultraviolet (XUV) pulse with photon energies far from the principal atomic He resonances. We find that XUV forward scattering from the nonstationary electronic wave packet promoted by the intense IR driving field is strongly enhanced as compared with the normal weak scattering from bound or free electrons. Based on this effect, we predict that large amplification of XUV radiation can be achieved in the cutoff spectral region of high-harmonic generation in He gas. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Física Coherence (Nuclear physics) Laser pulses, Ultrashort Coherència (Física nuclear) Làsers d'impulsos ultracurts Harmònics (Ones elèctriques) Coherent extreme ultraviolet light amplification by strong-field-enhanced forward scattering