High-speed waveguide-coupled graphene-on-graphene optical modulators

Abstract

An electro-absorption optical modulator concept based upon a dual-graphene layer is presented. The device consists of a silicon-on-insulator waveguide upon which two graphene layers reside, separated by a thin insulating region. The lower graphene acts as a tunable absorber, while the upper layer functions as a transparent gate electrode. Calculations based upon realistic graphene material properties show that 3-dB bandwidths over 100 GHz (30 GHz) are possible at near- (λ=1.55 μm) and mid- (λ=3.5μm) infrared bands. The effect of background doping and potential fluctuations on the bandwidth, modulation depth and insertion loss are also quantified.

18 pages, 4 figure

References in corpus (10)

• Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils
• Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
• Graphene Photonics and Optoelectronics
• Ultrafast graphene photodetector
• Graphene plasmonics: A platform for strong light-matter interaction
• Plasmonics in graphene at infra-red frequencies
• Universal dynamical conductance in graphite
• Graphene films with large domain size by a two-step chemical vapor deposition process
• A new electromagnetic mode in graphene
• High-speed waveguide-coupled graphene-on-graphene optical modulators

Cited by in corpus (11)

• CMOS-compatible graphene photodetector covering all optical communication bands
• Plasmons in graphene: Recent progress and applications
• Multifunctional graphene optical modulator and photodetector integrated on silicon waveguides
• Optical absorption in graphene integrated on silicon waveguides
• High-speed waveguide-coupled graphene-on-graphene optical modulators
• Theory and Design of Multifunctional Space-Time Metasurfaces
• Mid-infrared Electro-Optic Modulation in Few-layer Black Phosphorus
• Fundamental limits and near-optimal design of graphene modulators and non-reciprocal devices
• Enhanced Photodetection in Graphene-Integrated Photonic Crystal Cavity
• Graphene on Silicon Modulators
• Two-Photon Absorption in Gapped Bilayer Graphene with a Tunable Chemical Potential