Optical Field Enhancement in Nanoscale Slot Waveguides of Hyperbolic Metamaterials
Nanoscale slot waveguides of hyperbolic metamaterials are proposed and demonstrated for achieving large optical field enhancement. The dependence of the enhanced electric field within the air slot on waveguide mode coupling and permittivity tensors of hyperbolic metamaterials is analyzed both numerically and analytically. Optical intensity in the metamaterial slot waveguide can be more than 25 times stronger than that in a conventional silicon slot waveguide, due to tight optical mode confinement enabled by the ultrahigh refractive indices supported in hyperbolic metamaterials. The electric field enhancement effects are also verified with the realistic metal-dielectric multilayer waveguide structure. © 2012 Optical Society of America.
Y. He et al., "Optical Field Enhancement in Nanoscale Slot Waveguides of Hyperbolic Metamaterials," Optics Letters, Optical Society of America, Jan 2012.
The definitive version is available at http://dx.doi.org/10.1364/OL.37.002907
Mechanical and Aerospace Engineering
Article - Journal
© 2012 Optical Society of America, All rights reserved.