Hybrid graphene/silicon integrated optical isolators with photonic spin-orbit interaction
arXiv:1603.06332 · doi:10.1063/1.4945715
Abstract
Optical isolators are an important building block in photonic computation and communication. In traditional optics, isolators are realized with magneto-optical garnets. However, it remains challenging to incorporate such materials on an integrated platform because of the difficulty in material growth and bulky device footprint. Here, we propose an ultracompact integrated isolator by exploiting graphene's magneto-optical property on a silicon-on-insulator platform. The photonic nonreciprocity is achieved because the cyclotrons in graphene experiencing different optical spin exhibit different response to counterpropagating light. Taking advantage of cavity resonance effects, we have numerically optimized a device design, which shows excellent isolation performance with the extinction ratio over 45 dB and the insertion loss around 12 dB at a wavelength near 1.55 um. Featuring graphene's CMOS compatibility and substantially reduced device footprint, our proposal sheds light to monolithic integration of nonreciprocal photonic devices.
References in corpus (14)
- The electronic properties of graphene
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Room-Temperature Quantum Hall Effect in Graphene
- Spin-orbit interactions of light
- Energy gaps, topological insulator state and zero-field quantum Hall effect in graphene by strain engineering
- Chiral nanophotonic waveguide interface based on spin-orbit coupling of light
- Extraordinary momentum and spin in evanescent waves
- Giant Faraday rotation in single- and multilayer graphene
- Transport of Dirac quasiparticles in graphene: Hall and optical conductivities
- Bright visible light emission from graphene
- Intrinsic Terahertz Plasmons and Magnetoplasmons in Large Scale Monolayer Graphene
- Faraday effect in graphene enclosed in an optical cavity and the equation of motion method for the study of magneto-optical transport in solids
- Fabry-Perot enhanced Faraday rotation in graphene
- Hybrid graphene/silicon integrated optical isolators with photonic spin-orbit interaction