Optotwistronic of bilayer graphene

Abstract

We present a study of the nonlinear optical response of twisted bilayer graphene. We discuss the contribution of the Berry phase to the non-linearity when inversion symmetry is broken, thus underlining the interplay between band and real space geometry, and nonlinear response. We also highlight an effect which is characteristic of extreme nonlinear optics: the generation of harmonics in disguise. This effect emerges in twisted bilayer graphene at relatively moderate fields strengths because of the much reduced band width. Our findings contribute to the understanding of the link between geometry and optical properties, as well as of the extreme nonlinear optical regime in twisted bilayer graphene

References in corpus (21)

• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Moire bands in twisted double-layer graphene
• The electronic properties of bilayer graphene
• Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
• Origin of Mott insulating behavior and superconductivity in twisted bilayer graphene
• Maximally-localized Wannier orbitals and the extended Hubbard model for the twisted bilayer graphene
• Electronic structure of turbostratic graphene
• Energy Spectrum and Quantum Hall Effect in Twisted Bilayer Graphene
• Band Structure of Twisted Bilayer Graphene: Emergent Symmetries, Commensurate Approximants and Wannier Obstructions
• Non-Abelian gauge potentials in graphene bilayers
• Tunable Layer Circular Photogalvanic Effect in Twisted Bilayers
• Emergent ${\text{D}}_6$ symmetry in fully-relaxed magic-angle twisted bilayer graphene
• Topological Floquet Engineering of Twisted Bilayer Graphene
• Bound on resistivity in flat-band materials due to the quantum metric
• High-order nonlinear optical response of a twisted bilayer graphene
• Effective Floquet Hamiltonians for periodically-driven twisted bilayer graphene
• Floquet engineering of interlayer couplings: Tuning the magic angle of twisted bilayer graphene at the exit of a waveguide
• Terahertz photogalvanics in twisted bilayer graphene close to the second magic angle
• Longitudinal and anomalous Hall conductivity of a general two-band model
• The Nonlinear Optical Effects of Opening a Gap in Graphene
• Coulomb effects in the absorbance spectra of two-dimensional Dirac materials

Cited by in corpus (3)

• Zigzag edge ferromagnetism of triangular-graphene-quantum-dot-like system
• Berry curvature and shift vector effects at high-order wave mixing in biased bilayer graphene
• Tunable nonlinear excitonic optical response in biased bilayer graphene