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Direct coupling of plasmonic and photonic nanowires for hybrid nanophotonic components and circuits.

Research paper by Xin X Guo, Min M Qiu, Jiming J Bao, Benjamin J BJ Wiley, Qing Q Yang, Xining X Zhang, Yaoguang Y Ma, Huakang H Yu, Limin L Tong

Indexed on: 10 Dec '09Published on: 10 Dec '09Published in: Nano Letters



Abstract

We report direct coupling of plasmonic and photonic nanowires using ultracompact near-field interaction. Photon-plasmon coupling efficiency up to 80% with coupling length down to the 200 nm level is achieved between individual Ag and ZnO nanowires. Hybrid nanophotonic components, including polarization splitters, Mach-Zehnder interferometers, and microring cavities, are fabricated out of coupled Ag and ZnO nanowires. These components offer relatively low loss with subwavelength confinement; a hybrid nanowire microcavity exhibits a Q-factor of 520.