Orbital perspective on high-harmonic generation from solids

Álvaro Jiménez-Galán, Chandler Bossaer, Guilmot Ernotte, Andrew M. Parks, Rui E. F. Silva, David M. Villeneuve, André Staudte, Thomas Brabec, Adina Luican-Mayer and Giulio Vampa ()
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Álvaro Jiménez-Galán: National Research Council of Canada and University of Ottawa
Chandler Bossaer: National Research Council of Canada and University of Ottawa
Guilmot Ernotte: National Research Council of Canada and University of Ottawa
Andrew M. Parks: University of Ottawa
Rui E. F. Silva: Consejo Superior de Investigaciones Científicas (CSIC)
David M. Villeneuve: National Research Council of Canada and University of Ottawa
André Staudte: National Research Council of Canada and University of Ottawa
Thomas Brabec: University of Ottawa
Adina Luican-Mayer: University of Ottawa
Giulio Vampa: National Research Council of Canada and University of Ottawa

Nature Communications, 2023, vol. 14, issue 1, 1-6

Abstract: Abstract High-harmonic generation in solids allows probing and controlling electron dynamics in crystals on few femtosecond timescales, paving the way to lightwave electronics. In the spatial domain, recent advances in the real-space interpretation of high-harmonic emission in solids allows imaging the field-free, static, potential of the valence electrons with picometer resolution. The combination of such extreme spatial and temporal resolutions to measure and control strong-field dynamics in solids at the atomic scale is poised to unlock a new frontier of lightwave electronics. Here, we report a strong intensity-dependent anisotropy in the high-harmonic generation from ReS2 that we attribute to angle-dependent interference of currents from the different atoms in the unit cell. Furthermore, we demonstrate how the laser parameters control the relative contribution of these atoms to the high-harmonic emission. Our findings provide an unprecedented atomic perspective on strong-field dynamics in crystals, revealing key factors to consider in the route towards developing efficient harmonic emitters.

Date: 2023
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DOI: 10.1038/s41467-023-44041-0

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