Coherent interaction of femtosecond extreme-uv light with He atoms
作者： Daniel Strasser , Thomas Pfeifer , Brian J. Hom , Astrid M. Müller , Jürgen Plenge
DOI: 10.1103/PHYSREVA.73.021805
关键词: Femtosecond 、 Physics 、 Atomic physics 、 Photoionization 、 Excited state 、 Helium 、 Amplitude 、 Extreme ultraviolet 、 Excitation 、 Ionization
摘要: We show experimentally that spectral phase manipulation of ultrashort extreme-uv light pulses can induce and control coherent transient excitation the $\mathrm{He}(1s3p)$ excited state by nonresonant components broadband extreme-ultraviolet light. The 15th harmonic an intense $805\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$, $80\phantom{\rule{0.3em}{0ex}}\mathrm{fs}$ pulse is achieved propagation euv through a variable optical density He gas. acquired due to dispersive interaction off-resonance in with resonance enhances modifies excitation. temporal evolution coherently prepared amplitude probed ionization continuum $400\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$, pulse.
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