Graphene valley polarization as a function of carrier-envelope phase in few-cycle laser pulses and its footprints in harmonic signals
arXiv:2304.02320 · doi:10.1103/PhysRevB.107.205403
Abstract
We consider coherent dynamics of graphene charged carriers exposed to an intense few-cycle linearly polarized laser pulse. The results, obtained by solving the generalized semiconductor Bloch equations numerically in the Hartree-Fock approximation, taking into account many-body Coulomb interaction, demonstrate strong dependence of the valley polarization on the carrier-envelope phase (CEP), which is interpolated by the simple sinusoidal law. Then we consider harmonic generation in multi-cycle laser field by graphene preliminary exposed to an intense few-cycle laser pulse. We show that the second harmonic's intensity is a robust observable quantity that provides a gauge of CEP for pulse durations up to two optical cycles, corresponding to 40 at the wavelength of 6.2 .
arXiv comment9 pages, 10 figures
References in corpus (39)
- The electronic properties of graphene
- Control of valley polarization in monolayer MoS2 by optical helicity
- Valley polarization in MoS2 monolayers by optical pumping
- MoS_2 as an ideal material for valleytronics: valley-selective circular dichroism and valley Hall effect
- Valley contrasting physics in graphene: magnetic moment and topological transport
- Valley filter and valley valve in graphene
- Dielectric function, screening, and plasmons in 2D graphene
- Emergence of Superlattice Dirac Points in Graphene on Hexagonal Boron Nitride
- Weak localisation magnetoresistance and valley symmetry in graphene
- Strong suppression of weak (anti)localization in graphene
- Graphene valley filter using a line defect
- Ultrafast Photoluminescence from Graphene
- Intervalley scattering, long-range disorder, and effective time reversal symmetry breaking in graphene
- Valley susceptibility of an interacting two-dimensional electron system
- Field-induced polarisation of Dirac valleys in bismuth
- Generation of pure bulk valley current in graphene
- Inelastic carrier lifetime in graphene
- Light-Induced Valleytronics in Pristine Graphene
- Lightwave topology for strong-field valleytronics
- Valley separation in graphene by polarized light
- Ballistic Hot Electron Transport in Graphene
- Spin-valley filtering in strained graphene structures with artificially induced carrier mass and spin-orbit coupling
- Accurate determination of electron-hole asymmetry and next-nearest neighbor hopping in graphene
- Transmission through a boundary between monolayer and bilayer graphene
- Valley polarization induced second harmonic generation in graphene
- Topological resonance and single-optical-cycle valley polarization in gapped graphene
- Impact of electron-electron Coulomb interaction on the high harmonic generation process in graphene
- Probing of valley polarization in graphene via optical second-harmonic generation
- Controlling Valley-Polarisation in Graphene via Tailored Light Pulses
- Efficient high-harmonic generation in graphene with two-color laser field at orthogonal polarization
- All-Optical Ultrafast Valley Switching in Two-Dimensional Materials
- Measuring valley polarization in two-dimensional materials with second-harmonic spectroscopy
- Density-functional calculation of static screening in 2D materials: the long-wavelength dielectric function of graphene
- Valley polarization braiding in strained graphene
- Light-induced valley currents and magnetization in graphene rings
- Intense-pulse dynamics of massless Dirac electrons
- Valley filter from magneto-tunneling between single and bi-layer graphene
- A valleytronic diamond transistor: electrostatic control of valley-currents and charge state manipulation of NV centers
- Microscopic quantum description of second-order nonlinearities in 2D hexagonal nanostructures beyond the Dirac cone approximation