Complex carrier-envelope-phase effect of solid harmonics under nonadiabatic conditions

Huiqiao Wang, Yongkang Feng, Silin Fu, Jinbin Li, Xiao Zhang, and Hongchuan Du
Phys. Rev. A 99, 023406 – Published 5 February 2019

Abstract

We theoretically investigate the carrier-envelope-phase (CEP) effect of laser pulses in the generation of solid high-order harmonics under nonadiabatic conditions using the time-dependent density functional theory. It is found that the CEP dependence of solid harmonics is still complex even if the Keldysh parameter γ remains unchanged. Further analysis shows that the multiphoton ionization still contributes to the generation of high-order harmonics for solids with inversion symmetry when the minimum band gap between the highest valence band and the lowest conduction band is equal to even multiples of the laser frequency. The relative contribution of tunneling ionization and multiphoton ionization to the harmonic generation is responsible for this complex CEP dependence.

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  • Received 28 October 2018

DOI:https://doi.org/10.1103/PhysRevA.99.023406

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Huiqiao Wang1, Yongkang Feng2, Silin Fu2, Jinbin Li2, Xiao Zhang3, and Hongchuan Du2,*

  • 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 3Center for Interdisciplinary Studies and Key Laboratory for Magnetism and Magnetic Materials of the MoE, Lanzhou University, Lanzhou 730000, China

  • *duhch@lzu.edu.cn

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Vol. 99, Iss. 2 — February 2019

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