title: Double-layer graphene optical modulator.
abstract: Here we report a high-performance double-layer graphene optical modulator. By using two graphene layers and an oxide layer in between to form a p-oxide-n like junction, this modulator operates at 1 GHz with a high modulation depth (~0.16 dB/μm) at a moderate drive voltage (~5 V). Benefited from the symmetrical band structure of graphene near Dirac point, such design eliminates the optical loss widely existing in silicon photonics and has advantages including small footprint, low energy consumption, and low insertion loss.
authors.affiliation: NSF Nano-scale Science and Engineering Center (NSEC), 3112 Etcheverry Hall, University of California at Berkeley, Berkeley, California 94720, USA.
authors.forename: Ming
authors.initials: M
authors.lastname: Liu
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Yin
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D055096:Optical Devices; D010316:Particle Size; D012666:Semiconductors; D013685:Telecommunications / Q000295:instrumentation*
chemical_list: D006108:Graphite