Numerical Modeling of a Teeth-shaped Nano-plasmonic Waveguide Filter

TL;DR

This paper presents a numerical study of a novel teeth-shaped nano-plasmonic waveguide filter in MIM structures, demonstrating its filtering capabilities, compact size, and ease of fabrication for high-density integration.

Contribution

It introduces a new teeth-shaped plasmonic filter design with a modified model based on multiple-beam interference and scattering matrix analysis.

Findings

Effective filtering performance comparable to grating-like structures

Compact submicrometer size suitable for high integration

Relatively simple fabrication process

Abstract

In this paper, tooth-shaped and multiple-teeth-shaped plasmonic filters in the metal-insulator-metal (MIM) waveguides are demonstrated numerically. By introducing a three-port waveguide splitter, a modified model based on the multiple-beam-interference and the scattering matrix is given. The ransmittance spectrum as a function of teeth width, depth, period and period number are respectively addressed. The result shows the new structure not only performs the filtering function as well as MIM grating-like structures, but also is of submicrometer size for ultra-high integration and relatively easy fabrication.