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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2309.16313 |
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| _version_ | 1866909202514968576 |
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| author | Weitz, Tobias Heide, Christian Hommelhoff, Peter |
| author_facet | Weitz, Tobias Heide, Christian Hommelhoff, Peter |
| contents | When Bloch electrons in a solid are exposed to a strong optical field, they are coherently driven in their respective bands where they acquire a quantum phase as the imprint of the band shape. If an electron approaches an avoided crossing formed by two bands, it may be split by undergoing a Landau-Zener transition. We here employ subsequent Landau-Zener transitions to realize strong-field Bloch electron interferometry (SFBEI), allowing us to reveal band structure information. In particular, we measure the Fermi velocity (band slope) of graphene in the vicinity of the K points as (1.07$\pm$0.04) nm fs$^{-1}$. We expect SFBEI for band structure retrieval to apply to a wide range of material systems and experimental conditions, making it suitable for studying transient changes in band structure with femtosecond temporal resolution at ambient conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_16313 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Strong-Field Bloch Electron Interferometry for Band Structure Retrieval Weitz, Tobias Heide, Christian Hommelhoff, Peter Optics Mesoscale and Nanoscale Physics When Bloch electrons in a solid are exposed to a strong optical field, they are coherently driven in their respective bands where they acquire a quantum phase as the imprint of the band shape. If an electron approaches an avoided crossing formed by two bands, it may be split by undergoing a Landau-Zener transition. We here employ subsequent Landau-Zener transitions to realize strong-field Bloch electron interferometry (SFBEI), allowing us to reveal band structure information. In particular, we measure the Fermi velocity (band slope) of graphene in the vicinity of the K points as (1.07$\pm$0.04) nm fs$^{-1}$. We expect SFBEI for band structure retrieval to apply to a wide range of material systems and experimental conditions, making it suitable for studying transient changes in band structure with femtosecond temporal resolution at ambient conditions. |
| title | Strong-Field Bloch Electron Interferometry for Band Structure Retrieval |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2309.16313 |