Intense-pulse dynamics of massless Dirac electrons
arXiv:2109.04249 · doi:10.1103/PhysRevResearch.4.L022014
Abstract
We identify and describe how intense short light pulses couple to massless Dirac fermions in two-dimensional systems. The ensuing excitation dynamics exhibits unusual scaling with the wavelength of the light due the linear dispersion of the band structure and the fact that light coupling is efficient only close to the Dirac points. We exploit these features to achieve valley polarization of more than 70 % with simple pulse shapes. Quantitative results are given for pristine graphene.
5 pages, 4 figures
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Cited by in corpus (8)
- All-Optical Ultrafast Valley Switching in Two-Dimensional Materials
- Fishbone resonance structure in the attosecond transient absorption spectroscopy of graphene
- Accelerating Nonequilibrium Green functions simulations: the G1-G2 scheme and beyond
- Enhancement of valley selective excitation by a linearly polarized two-color laser pulse
- Origins of Valley Current Reversal in Partially Overlapped Graphene Layers
- Graphene valley polarization as a function of carrier-envelope phase in few-cycle laser pulses and its footprints in harmonic signals
- Energy symmetry and interlayer wave function ratio of tunneling electrons in partially overlapped graphene
- Tunnel Valley Current Filter in the Partially Overlapped Graphene under the Vertical Electric Field