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Modifying angular and polarization selection rules of high-order harmonics by controlling electron trajectories in k-space
https://repo.qst.go.jp/records/80086
https://repo.qst.go.jp/records/800864bc1532c-adc8-4e5c-ab4c-c8d948d94a37
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-04-12 | |||||
タイトル | ||||||
タイトル | Modifying angular and polarization selection rules of high-order harmonics by controlling electron trajectories in k-space | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
佐成晏之
× 佐成晏之× 乙部, 智仁× 金光義彦× 廣理英基× Otobe, Tomohito |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Frequency-mixing processes of optical fields in solids are very important for many nonlinear optics applications, e.g., sum/difference frequency generation, optical parametric generation, and four-wave mixing . The recent developments of strong mid-infrared and terahertz light pulses have allowed electrons to be driven into a region far from the band edge, leading to high-order harmonics generation (HHG) by the field-driven carriers in the band structure [2-9]. However, despite their vital importance to frequency-mixing applications and the band reconstruction methodology, an angular and polarization selection rule for frequency-mixing processes in HHG induced by two-color optical fields has not yet been studied. Here, we observed HHG from a bulk crystal GaSe excited by orthogonally polarized two-color laser fields. Good agreement between the observed angle dependence and an analytical formula derived by taking into account the two-dimensional electron motion indicates that the one optical field amplifies the intraband nonlinear current driven with the other field and enhances the high-order harmonics (HHs). Our results provide the selection rule for frequency-mixing processes deformed by strongly driven carriers, which may lead to new technologies for polarization control and waveform synthesis of HHs with ultra-broadband spectra. | |||||
書誌情報 |
Nature Communications 巻 11, p. 3069-1-3069-7, 発行日 2020-06 |
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出版者 | ||||||
出版者 | Springer Nature | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2041-1723 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1038/s41467-020-16875-5 | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.nature.com/articles/s41467-020-16875-5 |