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Attosecond dynamical Franz-Keldysh effect in polycrystalline diamond
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Attosecond dynamical Franz-Keldysh effect in polycrystalline diamond
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Journal Article
Attosecond dynamical Franz-Keldysh effect in polycrystalline diamond
2016
Overview
Short, intense laser pulses can be used to access the transition regime between classical and quantum optical responses in dielectrics. In this regime, the relative roles of inter- and intraband light-driven electronic transitions remain uncertain. We applied attosecond transient absorption spectroscopy to investigate the interaction between polycrystalline diamond and a few-femtosecond infrared pulse with intensity below the critical intensity of optical breakdown. Ab initio time-dependent density functional theory calculations, in tandem with a two-band parabolic model, accounted for the experimental results in the framework of the dynamical Franz-Keldysh effect and identified infrared induction of intraband currents as the main physical mechanism responsible for the observations.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
