Characteristics of gap plasmon waveguide with stub structures

Quantum waveguide transport in serial stub and loop structures.

We have studied the quantum transmission properties of serial stub and loop structures. Throughout we have considered free electron networks and the scattering arises solely due to the geometric nature of the problem. The band formation in these geometric structures is analyzed and compared with the conventional periodic potential scatterers. Some essential differences are pointed out. We show ...

Omnidirectional optical attractor in structured gap-surface plasmon waveguide

An optical attractor based on a simple and easy to fabricate structured metal-dielectric-metal (SMDM) waveguide is proposed. The structured waveguide has a variable thickness in the vicinity of an embedded microsphere and allow for adiabatic nano-focusing of gap-surface plasmon polaritons (GSPPs). We show that the proposed system acts as an omnidirectional absorber across a broad spectral range...

Nanofocusing in a metal - insulator - metal gap plasmon waveguide with a 3 - dimensional linear

An Au-SiO2-Au (metal-insulator-metal; MIM) surface-plasmon-polariton (SPP) guide is schematically presented in Fig. S1a. As the name “MIM” implies, a structural symmetry exists with respect to the mirror plane that cuts through the center of the SiO2 layer and is parallel to the x–y plane. As a result, supported SPP modes in the guide can be classified into two major types, each with its own di...

Nanofocusing in a metal-insulator-metal gap plasmon waveguide with a three-dimensional linear taper

The development of techniques for efficiently confining photons on the deep sub-wavelength spatial scale will revolutionize scientific research and engineering practices. The efficient coupling of light into extremely small nanofocusing devices has been a major challenge in on-chip nanophotonics because of the need to overcome various loss mechanisms and the on-chip nanofabrication challenges. ...

Bend loss in surface plasmon polariton band-gap structures