title: Extraordinary control of terahertz beam reflectance in graphene electro-absorption modulators.
abstract: We demonstrate a graphene-based electro-absorption modulator achieving extraordinary control of terahertz reflectance. By concentrating the electric field intensity in an active layer of graphene, an extraordinary modulation depth of 64% is achieved while simultaneously exhibiting low insertion loss (∼2 dB), which is remarkable since the active region of the device is atomically thin. This modulator performance, among the best reported to date, indicates the enormous potential of graphene for terahertz reconfigurable optoelectronic devices.
authors.affiliation: Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States. bsensale@nd.edu
authors.forename: Berardi
authors.initials: B
authors.lastname: Sensale-Rodriguez
authors.forename: Rusen
authors.initials: R
authors.lastname: Yan
authors.forename: Subrina
authors.initials: S
authors.lastname: Rafique
authors.forename: Mingda
authors.initials: M
authors.lastname: Zhu
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Xuelei
authors.initials: X
authors.lastname: Liang
authors.forename: David
authors.initials: D
authors.lastname: Gundlach
authors.forename: Vladimir
authors.initials: V
authors.lastname: Protasenko
authors.forename: Michelle M
authors.initials: MM
authors.lastname: Kelly
authors.forename: Debdeep
authors.initials: D
authors.lastname: Jena
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Huili Grace
authors.initials: HG
authors.lastname: Xing
mesh_terms: D000042:Absorption; D006108:Graphite / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D055053:Terahertz Radiation
chemical_list: D006108:Graphite