1 citations · 1 across the 2 of their papers we have counts for
4 papers
Up/down-conversion of infrared light by few-layer graphene polytypes
Patrick Johansen Sarsfield, Takaaki V. Joya, Takuto Kawakami +2
Optical nonlinearity of materials with broken inversion symmetry enables two-photon processes where an incoming pair of photons can generate an up-converted photon with the combine…
Second-harmonic generation in twisted double bilayer graphene: Double-resonant enhancement from moiré flat bands
Takaaki V. Joya, Takuto Kawakami, Mikito Koshino
We theoretically investigate second-harmonic generation (SHG) in twisted double bilayer graphene (TDBG) with AB--AB and AB--BA stacking configurations using a perturbative approach…
Resonant Structure of Second Harmonic Generation in Multilayer Graphene Polytypes
Patrick Johansen Sarsfield, Takaaki V. Joya, Takuto Kawakami +2
Second harmonic generation (SHG) is a powerful optical tool for identifying non-centrosymmetric crystalline structures. Here, we analyze SHG in multilayer graphenes (MLG), with a f…
Shift current response in twisted double bilayer graphenes
Takaaki V. Joya, Takuto Kawakami, Mikito Koshino
We calculate the shift current response in twisted double bilayer graphenes (TDBG) by applying the perturbative approach to the effective continuum Hamiltonian. We have performed a…