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Traveling waves in two parallel infinite linear point-scatterer arrays.

Ioannis Chremmos¹, George Fikioris

¹School of Electrical and Computer Engineering, National Technical University of Athens, Zografos 15773, Athens, Greece. jochremm@central.ntua.gr

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|June 7, 2011

Summary

This summary is machine-generated.

This study analyzes traveling waves in coupled point-scatterer arrays, revealing slow supermodes due to coupling. These findings offer insights for designing optical couplers using nanoparticle chains.

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Area of Science:

Physics
Nanophotonics
Wave phenomena

Background:

Coupled systems exhibit unique wave behaviors.
Point-scatterer arrays are fundamental structures in wave physics.
Optical couplers are essential components in photonic integrated circuits.

Purpose of the Study:

To analytically investigate traveling waves in two coupled parallel infinite linear point-scatterer arrays.
To explore the formation of supermodes resulting from array coupling.
To examine the influence of axial offset on wave propagation.

Main Methods:

Analytical treatment of traveling waves in coupled infinite linear point-scatterer arrays.
Numerical investigation of mode splitting, dispersion curves, and coupling length.
Parametric study considering inter-element spacing, inter-array distance, and axial offset.

Main Results:

Discovery of slow quasi-even/odd supermodes arising from coupling-induced mode splitting.
Observation of exactly even/odd supermodes at zero axial offset.
Detailed numerical analysis of mode characteristics versus geometric parameters.

Conclusions:

Coupled point-scatterer arrays support novel supermodes analogous to optical waveguide couplers.
Axial offset significantly influences supermode properties.
The findings have potential applications in developing directional optical couplers using nanoparticle chains.