Coaxial multi-layer hybrid plasmonic waveguide at subwavelength scale

摘要: A new type of a coaxial multi-layer plasmonic waveguide is proposed. The mode propagation properties are analyzed at the communication working wavelength. Theoretical investigations reveal that enhanced optical confinement can be achieved in two low-index dielectric media layers. size sub- or deep sub-wavelength scale. loss well compensated by replacing high-index with gain material to achieve longer length better confinement. comparisons between proposed and waveguides studied published literatures also considered. These potentially lay groundwork for further applications nanowire multilayer hybrid structures. This structure could enable various such asnanophotonic waveguides, high-quality nanolasers, trapping biosensors.