Attosecond dynamical Franz-Keldysh effect in polycrystalline diamond

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 spectros...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2016-08, Vol.353 (6302), p.916-919
Main Authors: Lucchini, M., Sato, S. A., Ludwig, A., Herrmann, J., Volkov, M., Kasmi, L., Shinohara, Y., Yabana, K., Gallmann, L., Keller, U.
Format: Article
Language:English
Subjects:
Diamonds
Electromagnetics
Electron transitions
Electronic structure
Infrared
Light
Light levels
Magnetic fields
Optical properties
Polycrystalline diamond
Polycrystals
Scaffolds
Time dependence
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Summary: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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.aag1268