Probing of valley polarization in graphene via optical second-harmonic generation

Abstract

Valley polarization in graphene breaks inversion symmetry and therefore leads to second-harmonic generation. We present a complete theory of this effect within a single-particle approximation. It is shown that this may be a sensitive tool to measure the valley polarization created, e.g., by polarized light and, thus, can be used for a development of ultrafast valleytronics in graphene.

5 pages, 3 figures

References in corpus (9)

• Valley polarization in MoS2 monolayers by optical pumping
• Valley filter and valley valve in graphene
• Half-metallic ferromagnets: From band structure to many-body effects
• The optical conductivity of graphene in the visible region of the spectrum
• Detecting Topological Currents in Graphene Superlattices
• Topological confinement in bilayer graphene
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Cited by in corpus (7)

• Doping Induced Second Harmonic Generation in Centrosymmetric Graphene from Quadrupole Response
• Theory of plasmonic effects in nonlinear optics: the case of graphene
• Resonant optical second harmonic generation in graphene-based heterostructures
• Symmetry breaking and (pseudo)spin polarization in Veselago lenses for massless Dirac fermions
• Perfect valley filter controlled by Fermi velocity modulation in graphene
• Electric field-induced valley degeneracy lifting in uniaxial strained graphene: evidence from magnetophonon resonance
• Probing valley filtering effect by Andreev reflection in zigzag graphene nanoribbon