Article Three-dimensional bonding anisotropy of bulk hexagonal metal titanium demonstrated by high harmonic generation

Ikufumi Katayama ORCID ; Kento Uchida ; Kimika Takashina ; Akari Kishioka ; Misa Kaiho ; Satoshi Kusaba ORCID ; Ryo Tamaki ; Ken-ichi Shudo ; Masahiro Kitajima ; Thien Duc Ngo SAMURAI ORCID ; Tadaaki Nagao SAMURAI ORCID ; Jun Takeda ORCID ; Koichiro Tanaka ORCID ; Tetsuya Matsunaga ORCID

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Ikufumi Katayama, Kento Uchida, Kimika Takashina, Akari Kishioka, Misa Kaiho, Satoshi Kusaba, Ryo Tamaki, Ken-ichi Shudo, Masahiro Kitajima, Thien Duc Ngo, Tadaaki Nagao, Jun Takeda, Koichiro Tanaka, Tetsuya Matsunaga. Three-dimensional bonding anisotropy of bulk hexagonal metal titanium demonstrated by high harmonic generation. Communications Physics. 2024, 7 (), 404. https://doi.org/10.1038/s42005-024-01906-0
SAMURAI

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(abstract)

High harmonic generation (HHG) in solid-state materials is an emerging field of photonics research that can unveil the detailed electronic structure of materials, bond strengths and scattering processes of electrons. Although HHGin semiconducting and insulating materials has been intensively investigated both experimentally and theoretically, metals have rarely been explored because the strong screening effect of high-density free electrons is considered to significantly weaken the HHG signal. Here, we investigated HHG upon infrared excitation in bulk hexagonal metal titanium (Ti), a typical building block for practical lightweight structural materials. By analyzing the polarization dependence, the approach revealed the three-dimensional (3D) anisotropy in the electronic states. The results demonstrated the potential of HHG spectroscopy for characterizing 3D bonding anisotropy in metallic systems that are of fundamental importance for designing lightweight and strong structural materials.

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Keyword: high harmonics generation, titanium, anisotropy, polarization

Date published: 2024-12-18

Publisher: Springer Science and Business Media LLC

Journal:

  • Communications Physics (ISSN: 23993650) vol. 7 404

Funding:

  • MEXT | Japan Society for the Promotion of Science 22K18322
  • MEXT | Japan Society for the Promotion of Science 22K03484
  • MEXT | Japan Society for the Promotion of Science 17H06124
  • MEXT | Japan Society for the Promotion of Science 21H05017
  • MEXT | Japan Society for the Promotion of Science 22H01820
  • Light Metals Educational Foundation
  • the Japan Institute of Metals and Materials

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5211

First published URL: https://doi.org/10.1038/s42005-024-01906-0

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Updated at: 2024-12-24 13:59:07 +0900

Published on MDR: 2024-12-25 08:30:32 +0900

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