title: Graphene-based tunable plasmonic Bragg reflector with a broad bandwidth.
abstract: We propose and numerically analyze a plasmonic Bragg reflector formed in a graphene waveguide. The results show that the graphene plasmonic Bragg reflector can produce a broadband stopband that can be tuned over a wide wavelength range by a small change in the Fermi energy level of graphene. By introducing a defect into the Bragg reflector, we can achieve a Fabry-Perot-like microcavity with a quality factor of 50 for the defect resonance mode formed in the stopband. The proposed Bragg reflector could be used as a broadband ultrafast tunable integrated filter and a broadband modulator. In addition, the defect microcavity may find applications in graphene-based resonators.
authors.forename: Jin
authors.initials: J
authors.lastname: Tao
authors.forename: XueChao
authors.initials: X
authors.lastname: Yu
authors.forename: Bin
authors.initials: B
authors.lastname: Hu
authors.forename: Alexander
authors.initials: A
authors.lastname: Dubrovkin
authors.forename: Qi Jie
authors.initials: QJ
authors.lastname: Wang
mesh_terms: D006108:Graphite; D055620:Optical Phenomena; D012031:Refractometry / Q000379:methods*
chemical_list: D006108:Graphite