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  • Open Access

Attosecond pulse generation from Weyl semimetals

Prachi Venkat1, Amar Bharti2, and Gopal Dixit1,3,*

  • *Contact author: gdixit@phy.iitb.ac.in
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Phys. Rev. B 113, 125144 – Published 25 March, 2026

DOI: https://doi.org/10.1103/6nxz-kgxd

Abstract

The generation of attosecond pulses from higher-order harmonics is an essential milestone toward enabling time-resolved spectroscopy of electronic processes in matter on the attosecond timescale. The avenue for high-harmonic generation from solids has proliferated since its discovery a decade ago. However, isolated attosecond pulse generation from solids remains scarce. We report a theoretical proposal that leverages Weyl semimetals for highly efficient attosecond pulse generation in the far-ultraviolet region. The generation of isolated attosecond pulses from Weyl semimetals is achieved using two-color laser pulses, which generate a broad higher-harmonic plateau ranging from 3 to 11 eV. Attosecond pulses with comparable durations – spanning approximately 500 to 900 as – are generated in both collinear and orthogonal configurations of the two-color fields. The strength and duration of the attosecond pulses can be optimized by tailoring the polarization direction and relative strength of the two-color field.

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Phys. Rev. B 113, 125144– Published 25 March, 2026
  • Received 4 August 2025
  • Revised 12 January 2026
  • Accepted 4 March 2026
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