Strain effects on high-harmonic generation in monolayer hexagonal boron nitride
Based on the time-dependent density functional theory, we theoretically investigate the influence of mechanical strains on the high-order harmonic generation (HHG) in the monolayer hexagonal boron nitride (hBN) crystal. We show that mechanical strains can largely modify the band structure and facili...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-10-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2022.1032671/full |
| _version_ | 1817985613599604736 |
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| author | Xiao-Shuang Kong Xiao-Yuan Wu Lei Geng Wan-Dong Yu |
| author_facet | Xiao-Shuang Kong Xiao-Yuan Wu Lei Geng Wan-Dong Yu |
| author_sort | Xiao-Shuang Kong |
| collection | DOAJ |
| description | Based on the time-dependent density functional theory, we theoretically investigate the influence of mechanical strains on the high-order harmonic generation (HHG) in the monolayer hexagonal boron nitride (hBN) crystal. We show that mechanical strains can largely modify the band structure and facilitate the harmonic emission. Compared to uniaxial strains, we find that biaxial strains may enhance the HHG yield significantly, and the HHG spectroscopy generated by a linearly polarized laser is closely related to the symmetry of the deformed hBN. Moreover, when driven by a circularly polarized laser, we find that the appearance of the 3n-order harmonics manifests the restoration of the three-fold rotational symmetry. Our results will be useful in controlling the HHG spectroscopy and probing lattice deformations in crystals. |
| first_indexed | 2024-04-14T00:00:23Z |
| format | Article |
| id | doaj.art-93b3b697003f417d93142031f5341e48 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-04-14T00:00:23Z |
| publishDate | 2022-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-93b3b697003f417d93142031f5341e482022-12-22T02:23:44ZengFrontiers Media S.A.Frontiers in Physics2296-424X2022-10-011010.3389/fphy.2022.10326711032671Strain effects on high-harmonic generation in monolayer hexagonal boron nitrideXiao-Shuang KongXiao-Yuan Wu Lei Geng Wan-Dong YuBased on the time-dependent density functional theory, we theoretically investigate the influence of mechanical strains on the high-order harmonic generation (HHG) in the monolayer hexagonal boron nitride (hBN) crystal. We show that mechanical strains can largely modify the band structure and facilitate the harmonic emission. Compared to uniaxial strains, we find that biaxial strains may enhance the HHG yield significantly, and the HHG spectroscopy generated by a linearly polarized laser is closely related to the symmetry of the deformed hBN. Moreover, when driven by a circularly polarized laser, we find that the appearance of the 3n-order harmonics manifests the restoration of the three-fold rotational symmetry. Our results will be useful in controlling the HHG spectroscopy and probing lattice deformations in crystals.https://www.frontiersin.org/articles/10.3389/fphy.2022.1032671/fullmechanical strainshigh-order harmonic generationmonolayer hexagonal boron nitride crystaltime-dependent density functional theorylaser-matter interaction |
| spellingShingle | Xiao-Shuang Kong Xiao-Yuan Wu Lei Geng Wan-Dong Yu Strain effects on high-harmonic generation in monolayer hexagonal boron nitride Frontiers in Physics mechanical strains high-order harmonic generation monolayer hexagonal boron nitride crystal time-dependent density functional theory laser-matter interaction |
| title | Strain effects on high-harmonic generation in monolayer hexagonal boron nitride |
| title_full | Strain effects on high-harmonic generation in monolayer hexagonal boron nitride |
| title_fullStr | Strain effects on high-harmonic generation in monolayer hexagonal boron nitride |
| title_full_unstemmed | Strain effects on high-harmonic generation in monolayer hexagonal boron nitride |
| title_short | Strain effects on high-harmonic generation in monolayer hexagonal boron nitride |
| title_sort | strain effects on high harmonic generation in monolayer hexagonal boron nitride |
| topic | mechanical strains high-order harmonic generation monolayer hexagonal boron nitride crystal time-dependent density functional theory laser-matter interaction |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2022.1032671/full |
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