2019年12月
Interband resonant high-harmonic generation by valley polarized electron–hole pairs
Nature Communications
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- 巻
- 10
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41467-019-11697-6
- 出版者・発行元
- Springer Science and Business Media LLC
High-harmonic generation in solids is a unique tool to investigate the electron dynamics in strong light fields. The systematic study in monolayer materials is required to deepen the insight into the fundamental mechanism of high-harmonic generation. Here we demonstrated nonperturbative high harmonics up to 18th order in monolayer transition metal dichalcogenides. We found the enhancement in the even-order high harmonics which is attributed to the resonance to the band nesting energy. The symmetry analysis shows that the valley polarization and anisotropic band structure lead to polarization of the high-harmonic radiation. The calculation based on the three-step model in solids revealed that the electron-hole polarization driven to the band nesting region should contribute to the high harmonic radiation, where the electrons and holes generated at neighboring lattice sites are taken into account. Our findings open the way for attosecond science with monolayer materials having widely tunable electronic structures.
- リンク情報
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- DOI
- https://doi.org/10.1038/s41467-019-11697-6
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000481604300015&DestApp=WOS_CPL
- URL
- http://www.nature.com/articles/s41467-019-11697-6.pdf
- URL
- http://www.nature.com/articles/s41467-019-11697-6
- ID情報
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- DOI : 10.1038/s41467-019-11697-6
- ISSN : 2041-1723
- eISSN : 2041-1723
- Web of Science ID : WOS:000481604300015