Surface plasmon polariton device including discontinuous waveguide separated by gap, and apparatus and method for generating surface plasmon polariton signal using same

摘要

A plasmonic device and an apparatus and method for generating a surface plasmon polariton (SPP) mode using the plasmonic device are disclosed herein. The plasmonic device includes a first plasmonic waveguide and a second plasmonic waveguide. The first plasmonic waveguide is made of a strip-shaped metal material forming at least one pair of first metal-dielectric interfaces along with a dielectric layer, and extends from an input location to a gap start location. The second plasmonic waveguide is made of a strip-shaped metal material forming at least one pair of second metal-dielectric interfaces in planes identical to those of the at least one pair of first metal-dielectric interfaces of the first plasmonic waveguide, and extends from a gap end location, spaced apart from the gap start location by the length of a gap along the propagation direction of the SPP, to an SPP output location.

主权项

1. A plasmonic device, comprising:
a first plasmonic waveguide made of a strip-shaped metal material having at least one pair of first metal surfaces forming at least one pair of first metal-dielectric interfaces along with a dielectric layer so that a predetermined coupled mode surface plasmon polariton (SPP) can propagate, and configured to extend from an input location, at which an SPP is input, to a gap start location over a first length along a propagation direction of an excited SPP while having a predetermined width; and a second plasmonic waveguide made of a strip-shaped metal material having at least one pair of second metal surfaces forming at least one pair of second metal-dielectric interfaces in planes identical to those of the at least one pair of first metal-dielectric interfaces of the first plasmonic waveguide so that the coupled mode SPP can propagate, and configured to extend from a gap end location, spaced apart from the gap start location by a length of a gap along the propagation direction of the SPP, to an SPP output location over a second length along the propagation direction of the SPP while having a predetermined width; wherein the dielectric layer is made of a dielectric material that is capable of internally distributing a magnetic field of a TM mode SPP in an area that comes into contact with the at least one pair of first metal surfaces and at least one pair of second metal surfaces of the first and second plasmonic waveguides on the first and second metal-dielectric interfaces and an area that extends from the gap start location to the gap end location.