Anisotropic high-harmonic generation in bulk crystals
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TLDR
In this article, the authors demonstrate that high-harmonic generation in solids is sensitive to interatomic bonding and show that harmonic efficiency is enhanced for semi-classical electron trajectories that connect (avoid) neighbouring atomic sites in the crystal.Abstract:
High-harmonic generation in a solid turns out to be sensitive to the interatomic bonding — a very useful feature that could enable the all-optical imaging of the interatomic potential. The microscopic valence electron density determines the optical, electronic, structural and thermal properties of materials. However, current techniques for measuring this electron charge density are limited: for example, scanning tunnelling microscopy is confined to investigations at the surface, and electron diffraction requires very thin samples to avoid multiple scattering1. Therefore, an optical method is desirable for measuring the valence charge density of bulk materials. Since the discovery of high-harmonic generation (HHG) in solids2, there has been growing interest in using HHG to probe the electronic structure of solids3,4,5,6,7,8,9,10,11. Here, using single-crystal MgO, we demonstrate that high-harmonic generation in solids is sensitive to interatomic bonding. We find that harmonic efficiency is enhanced (diminished) for semi-classical electron trajectories that connect (avoid) neighbouring atomic sites in the crystal. These results indicate the possibility of using materials’ own electrons for retrieving the interatomic potential and thus the valence electron density, and perhaps even wavefunctions, in an all-optical setting.read more
Citations
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High-harmonic generation in graphene enhanced by elliptically polarized light excitation
TL;DR: The observation of up to ninth-order harmonics in graphene excited by mid-infrared laser pulses at room temperature opens up the possibility of investigating strong-field and ultrafast dynamics and nonlinear behavior of massless Dirac fermions.
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High-harmonic generation from solids
Shambhu Ghimire,David A. Reis +1 more
TL;DR: In this article, a review of recent efforts at understanding and characterizing high-order harmonics from solid-state materials is presented, which can be used to probe driven ultrafast dynamics and its prospects for novel, compact short-wavelength light sources.
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Measurement of the Berry curvature of solids using high-harmonic spectroscopy.
Tran Trung Luu,Hans Jakob Wörner +1 more
TL;DR: This work reports polarimetry of high-harmonic emission from solids and exploits this novel capability to directly retrieve the Berry curvature of α-quartz using semiclassical transport theory, and retrieves the Berry phase from spectra measured in perpendicular polarization.
Journal ArticleDOI
Colloquium: Strong-field phenomena in periodic systems
TL;DR: In this article, a review of recent experimental advances in the study of strong-field dynamics in crystals and nanostructures is presented, along with several avenues toward measuring and controlling electronic processes up to petahertz frequencies.
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Enhanced high-harmonic generation from an all-dielectric metasurface
Hanzhe Liu,Hanzhe Liu,Cheng Guo,Giulio Vampa,Jingyuan Linda Zhang,Tomas Sarmiento,Meng Xiao,Philip H. Bucksbaum,Jelena Vuckovic,Shanhui Fan,David A. Reis,David A. Reis +11 more
TL;DR: In this paper, the authors report enhanced non-perturbative high-harmonic emission from a Fano-resonant Si metasurface that possesses a classical analogue of electromagnetically induced transparency.
References
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TL;DR: In this article, high-order harmonic generation is observed in a bulk crystalline solid with important implications for attosecond science, where the host medium for this interaction is typically a gas.
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High harmonic interferometry of multi-electron dynamics in molecules
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