Non-perturbative generation of above-threshold harmonics from pre-excited argon atoms in intense mid-infrared laser fields

2015/10/18 by Guihua Li, Hongqiang Xie, Li, Guihua +11
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Optics (physics.optics) #physics.atom-ph #physics.optics

paper · pdf · doi:10.48550/arxiv.1510.05250

arxiv created 2015/10/18 · arxiv updated 2015/10/20

Abstract

We experimentally investigate the generation of above-threshold harmonics completely from argon atoms on an excited state using mid-infrared femtosecond laser pulses. The highly nonlinear dependences of the observed signal on the pulse energy and polarization of the driver laser pulses indicate its non-perturbative characteristic.

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