Subcycle Observation of Lightwave-Driven Dirac Currents in a Topological Surface Band
2019
Employing the carrier wave of light as an AC bias may pave the way to electronics at optical clock rates. Lightwave-driven currents play a key role in high-harmonic generation in solids [1–3], attosecond-streaking experiments [4], and atomic-scale ultrafast microscopy [5]. In conventional semiconductors and dielectrics, however, the finite effective mass and ultrafast scattering limit the electron's ballistic excursion and velocity.
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