論文

査読有り
2018年6月

Polarization-Resolved Study of High Harmonics from Bulk Semiconductors

PHYSICAL REVIEW LETTERS
  • Kaneshima, Keisuke
  • ,
  • Shinohara, Yasushi
  • ,
  • Takeuchi, Kengo
  • ,
  • Ishii, Nobuhisa
  • ,
  • Imasaka, Kotaro
  • ,
  • Kaji, Tomohiro
  • ,
  • Ashihara, Satoshi
  • ,
  • Ishikawa, Kenichi L.
  • ,
  • Itatani, Jiro

120
24
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevLett.120.243903
出版者・発行元
AMER PHYSICAL SOC

The polarization property of high harmonics from gallium selenide is investigated using linearly polarized midinfrared laser pulses. With a high electric field, the perpendicular polarization component of the odd harmonics emerges, which is not present with a low electric field and cannot be explained by the perturbative nonlinear optics. A two-dimensional single-band model is developed to show that the anisotropic curvature of an energy band of solids, which is pronounced in an outer part of the Brillouin zone, induces the generation of the perpendicular odd harmonics. This model is validated by three-dimensional quantum mechanical simulations, which reproduce the orientation dependence of the odd-order harmonics. The quantum mechanical simulations also reveal that the odd- and even-order harmonics are produced predominantly by the intraband current and interband polarization, respectively. These experimental and theoretical demonstrations clearly show a strong link between the band structure of a solid and the polarization property of the odd-order harmonics.

Web of Science ® 被引用回数 : 14

リンク情報
DOI
https://doi.org/10.1103/PhysRevLett.120.243903
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000434937000012&DestApp=WOS_CPL