Enhancement of Above Threshold Ionization in Resonantly Excited Helium Nanodroplets
نویسندگان
چکیده
Clusters and nanodroplets hold the promise of enhancing high-order nonlinear optical effects due to their high local density. However, only moderate enhancement has been demonstrated date. Here, we report observation energetic electrons generated by above-threshold ionization (ATI) helium (He) which are resonantly excited ultrashort extreme ultraviolet (XUV) free-electron laser pulses subsequently ionized near-infrared (NIR) or near-ultraviolet (UV) pulses. The electron emission ATI is enhanced several orders magnitude compared He atoms. crucial dependence intensities with number excitations in droplets suggests a collective effect.
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2021
ISSN: ['1079-7114', '0031-9007', '1092-0145']
DOI: https://doi.org/10.1103/physrevlett.127.093201