Toward Attosecond Vortices in Semiconductor Materials

Le résumé fourni par la source

We present theoretical results on the generation of short-wavelength vortex beams in semiconductors through their interaction with an intense Laguerre–Gauss (LG) beam, in the regime where nonperturbative high-order harmonics are generated. Our approach leverages key aspects of the microscopic mechanism for high-order harmonic generation (HHG) in condensed matter, including the incorporation of dephasing time in the semiconductor Bloch equations (SBEs), the integration of the SBE model with the thin-slab model, and the application of experimentally validated scaling laws for different harmonic orders. For our simulations, we use a zinc oxide crystal interacting with an LG vortex beam characterized by a topological charge of l = 1 . Time-domain analysis reveals that this is a feasible route, by synthesizing several harmonics, toward the generation of twisted attosecond pulse trains. These findings contribute to advancing the understanding of solid-state media interacting with structured light.

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