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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Published on: December 27, 2012

Efficient simulation of subwavelength plasmonic waveguides using implicitly restarted Arnoldi.

Amir Hosseini¹, Arthur Nieuwoudt, Yehia Massoud

¹Electrical and Computer Engineering Department, Rice University, Houston TX 77005, USA.

|June 17, 2009

Summary

This study introduces a new computational method for analyzing optical modes in plasmonic waveguides. The technique efficiently calculates propagation constants, enabling accurate modeling of complex nanophotonic structures.

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Area of Science:

Photonics and Nanophotonics
Computational Electromagnetics

Background:

Plasmonic waveguides are crucial for subwavelength light manipulation.
Accurate modeling of optical modes is essential for designing plasmonic devices.
Existing methods may struggle with complex geometries and fast-varying fields.

Purpose of the Study:

To present a novel full-vector finite difference method for solving optical modes.
To enable accurate simulation of one and two-dimensional subwavelength plasmonic waveguides.
To efficiently calculate propagation constants for dominant modes.

Main Methods:

Full-vector finite difference method.
Implicitly Restarted Arnoldi method for direct eigenvalue calculation.
Application to complex geometries and structures with fast-varying field profiles.

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Main Results:

The method demonstrates low computational complexity.
Accurate modeling of complex plasmonic waveguide geometries is achieved.
Automatic separation of evanescent and low-loss guided modes for bounded modes.

Conclusions:

The developed method offers an efficient and accurate approach for simulating plasmonic waveguides.
It is suitable for analyzing dominant modes and distinguishing between different mode types.
This facilitates the design and optimization of advanced nanophotonic devices.