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Diabatic Mechanisms of Higher-Order Harmonic Generation in Solid-State Materials under High-Intensity Electric Fields

T. Tamaya, A. Ishikawa, T. Ogawa, and K. Tanaka
Phys. Rev. Lett. 116, 016601 – Published 5 January 2016
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Abstract

We theoretically investigate mechanisms of higher-order harmonic generation in solid-state materials under a high-intensity ac electric field. A new theoretical framework presented in this Letter holds the legitimacy of Bloch’s theorem even under the influence of the high-intensity electric field and provides an exact treatment of the diabatic processes of Bloch electrons. Utilizing this framework, we first discovered that the diabatic processes, namely, ac Zener tunneling and semimetallization of semiconductors, are key factors for nonperturbative mechanisms of HHG. These mechanisms are classified by the field intensity and could be understood by an extended simple man model based on an analogy between tunnel ionization in gaseous media and Zener tunneling in semiconductors. These conclusions would stimulate the universal understanding of HHG mechanisms in both atomic and solid cases.

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  • Received 13 December 2014

DOI:https://doi.org/10.1103/PhysRevLett.116.016601

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

T. Tamaya1,*, A. Ishikawa2, T. Ogawa3, and K. Tanaka1,4,5

  • 1Department of Physics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
  • 2Department of Science for Advanced Materials, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan
  • 3Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
  • 4Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
  • 5CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan

  • *ttamaya@scphys.kyoto-u.ac.jp

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Issue

Vol. 116, Iss. 1 — 8 January 2016

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