Time-dependent density functional theory for strong electromagnetic fields in crystalline solids
By Kazuhiro Yabana, T. Sugiyama, Y. Shinohara, T. Otobe, G. Bertsch. 2011
186 citations recorded by the source corpus.
We apply the coupled dynamics of time-dependent density functional theory and Maxwell equations to the interaction of intense laser pulses with crystalline silicon. As a function of electromagnetic field intensity, we see several regions in the response. At the lowest intensities, the pulse is reflected and transmitted in accord with the dielectric response, and the characteristics of the energy deposition is consistent with two-photon absorption. The absorption process begins to deviate from that at laser intensities ~ 10^13 W/cm^2, where the energy deposited is of the order of 1 eV per atom. Changes in the reflectivity are seen as a function of intensity. When it passes a threshold of about 3 \times 1012 W/cm2, there is a small decrease. At higher intensities, above 2 \times 10^13 W/cm^2, the reflectivity increases strongly. This behavior can be understood qualitatively in a model treating the excited electron-hole pairs as a plasma.
Subfields: Atomic and Molecular Physics, and Optics, Computational Mechanics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/52552b30932369b6f95ccee75837bd466549a121
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In Atomic and Molecular Physics, and Optics
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Citations in the corpus
- Colloquium: Strong-field phenomena in periodic systems (2017, methodology): “…the numerical solution of the TDSE (Bachau et al., 2006; Korbman et al., 2013; Wu et al., 2015), density-matrix method (Haug and Koch, 2009; Lindberg and Koch, 1988) and time-dependent Kohn–Sham equations (Andrade et al., 2015; Otobe et al., 2016; Tancogne-Dejean et al., 2017; Yabana et al., 2012).”