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Ab-initio description for propagation of extreme light pulse in solids: recent progresses

Kazuhiro YABANA, Center for Computational Sciences, University of Tsukuba, Japan

Type

  • Vortrag

Topic

  • Advanced Materials Science (Field of Expertise)
  • Information Communication & Computing (Field of Expertise)
  • Andere Forschungsthemen

When we theoretically investigate interaction of an intense and ultrashort laser pulse with solids, there are two aspects that should be considered: the strong electric field of the light pulse induces nonlinear electron dynamics in solids, and the nonlinear polarization that arises from the electron dynamics affects the propagation of the light pulse. To describe the propagation of the intense light pulse, it is necessary to calculate simultaneously the propagation of the light electromagnetic fields and the electron dynamics. We have developed such scheme based on ab-initio time-dependent density functional theory [1], and have applied the method to various problems. In my talk, I would like to show several recent progresses of our approach: (1) oblique irradiation of a strong laser pulse on thin dielectric film, (2) pump-probe calculation for the generation of coherent optical phonon and amplification of the impulsively stimulated Raman scattering wave [2], and (3) a unified description for interaction of intense light pulse with thin materials, from mono-atomic layer to thick films [3].

[1] K. Yabana et.al, Phys. Rev. B85, 045134 (2012).
[2] A. Yamada et.al, arXiv:1810.06168.
[3] S. Yamada et.al, Phys. Rev. B98, 245147 (2018).

Host

TU Graz | Institute for Experimental Physics 5110

Time and Location

25. March 2019, 04:15 pm - 17:15

TU Graz, Campus Neue Technik, Petersgasse 16, TDK-Seminarraum (PHEG016), 8010 Graz, Austria

Additional informations

Language: English

Contact/Registration

Martin SCHULTZE
Institute of Experimental Physics
schultze@tugraz.at
Phone: +43 316 873 8142