Strong-Field Bloch Electron Interferometry for Band Structure Retrieval

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Hauptverfasser:	Weitz, Tobias, Heide, Christian, Hommelhoff, Peter
Format:	Preprint
Veröffentlicht:	2023
Schlagworte:	Optics Mesoscale and Nanoscale Physics
Online-Zugang:	Acceder al recurso
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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

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