Design and Analysis of Plasmonic Switch at mid-IR Wavelengths with Graphene Nano-Ribbons

Taking advantage of chemical potential (𝜇𝑐) one-layer and multi-layers graphene nano-ribbons, we designed and analyzed performance of plasmonic switches at mid-IR wavelengths. By slight varying the chemical potential of graphene, significant resonance shifts and modulation depth (MD) achieved. Finite element method numerical simulation show that plasmonic switch made of hexagonal boron nitride (hBN)/Graphene suffering relatively large MD, wavelength shifts(Δ𝜆) and broad bandwidth with N=6, and varying 𝜇𝑐 from 0.3eV- 0.4eV, 0.93, 1.1μm and 2μm, respectively. The proposed structure could be useful for research in compact and largely tunable mid-infrared photonic devices to realize on-chip CMOS optoelectronic systems