Abstract

All-optical logic operation is theoretically demonstrated by means of polarization-dependent four-wave mixing (FWM) processes in a highly nonlinear silicon hybrid plasmonic waveguide (HPWG) microring resonator. We design an ultra-compact ($\mathrm{radii}=1\mathrm{\mu m}$) microring resonator (MRR) that is realized by using a silicon HPWG with the capacity for subwavelength-bending. The HPWG exhibits very high confinement ($A_{\text{eff}}\sim 0.045{\mathrm{\mu m}}^2$) that can result in a remarkably high nonlinear parameter ($\gamma \sim 3000{\mathrm{W}}^{-1}{\mathrm{m}}^{-1}$), given a highly nonlinear gap material. By manipulating the polarization properties of the pump and signals with a very low electric field ($|E|\sim {10}^8{\mathrm{Vm}}^{-1}$), all-optical NOT, NOR, and NAND logical operations are obtained through the FWM process. These compact all-optical nanoplasmonic devices are stable, fabrication simplified, and silicon on insulator (SOI) compatible.

© 2015 Optical Society of America

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