Modal Analysis and Coupling in Metal-Insulator-Metal Waveguides

Details Modal Analysis and Coupling in Metal-Insulator-Metal Waveguides Modal Analysis and Coupling in Metal-Insulator-Metal Waveguides

2008-09-17

arxiv.org/abs/0809.2850v2

Phys. Rev. B 79, 035120 (2009)

Physics

Optics

17 pages, 13 figures, 2 tables, references expanded, typos fixed, figures slightly modified

Scientific paper

10.1103/PhysRevB.79.035120

This paper shows how to analyze plasmonic metal-insulator-metal waveguides using the full modal structure of these guides. The analysis applies to all frequencies, particularly including the near infrared and visible spectrum, and to a wide range of sizes, including nanometallic structures. We use the approach here specifically to analyze waveguide junctions. We show that the full modal structure of the metal-insulator-metal (MIM) waveguides--which consists of real and complex discrete eigenvalue spectra, as well as the continuous spectrum--forms a complete basis set. We provide the derivation of these modes using the techniques developed for Sturm-Liouville and generalized eigenvalue equations. We demonstrate the need to include all parts of the spectrum to have a complete set of basis vectors to describe scattering within MIM waveguides with the mode-matching technique. We numerically compare the mode-matching formulation with finite-difference frequency-domain analysis and find very good agreement between the two for modal scattering at symmetric MIM waveguide junctions. We touch upon the similarities between the underlying mathematical structure of the MIM waveguide and the PT symmetric quantum mechanical pseudo-Hermitian Hamiltonians. The rich set of modes that the MIM waveguide supports forms a canonical example against which other more complicated geometries can be compared. Our work here encompasses the microwave results, but extends also to waveguides with real metals even at infrared and optical frequencies.

Affiliated with

Also associated with

No associations

Rating

Modal Analysis and Coupling in Metal-Insulator-Metal Waveguides does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Modal Analysis and Coupling in Metal-Insulator-Metal Waveguides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modal Analysis and Coupling in Metal-Insulator-Metal Waveguides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-661302