title: Excitation of plasmonic waves in graphene by guided-mode resonances.
abstract: We propose an active plasmonic device based on graphene. Highly confined plasmonic waves in monolayer graphene are efficiently excited using an etched diffractive grating on silicon. The guided-wave resonance of the combined structure creates a sharp notch on the normal-incidence transmission spectra, as the incident optical wave couples to the graphene plasmonic wave. This structure can be used as a highly tunable optical filter or a broad-band modulator because the resonant wavelength can be quickly tuned over a wide wavelength range by a small change in the Fermi energy level of the graphene. In this paper, we analyze the performance of this device with finite-difference time-domain simulations. We compare the proposed structure with recently demonstrated graphene nanoribbons based on bound plasmonic oscillations.
authors.affiliation: Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States.
authors.forename: Weilu
authors.initials: W
authors.lastname: Gao
authors.forename: Jie
authors.initials: J
authors.lastname: Shu
authors.forename: Ciyuan
authors.initials: C
authors.lastname: Qiu
authors.forename: Qianfan
authors.initials: Q
authors.lastname: Xu
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D008027:Light; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D006108:Graphite