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Employing geometry dependent plasmon resonances of graphene gratings, we design a graphene bi-layer optical grating, which can achieve several orders of magnitude enhancement of the second-harmonic generation (SHG) intensity. More importantly, this dual grating can act as an ultrafast optical switch as the SHG intensity can be readily controlled via gate voltage tuning.
In this paper, a new approach is proposed to efficiently enhance the third-harmonic generation (THG) in graphene by employing a bilayer-grating structure. This scheme relies on the fact that the optical resonances of graphene structures are determined by the geometry. To boost the THG, we optimize the geometry of graphene bilayer gratings, thus achieving more than eight orders of magnitude enhancement...
We present a new numerical method to study the linear and nonlinear response of dispersive and nonlinear 2D materials by incorporating a nonlinear generalized source (GS) into the finite-difference time-domain (FDTD) method. This new method is particularly powerful when applied to the analysis of 2D materials, as most such materials cannot be studied directly by traditional FDTD method due to their...
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