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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 28, Iss. 6 — Jun. 1, 2011
  • pp: 962–969

Traveling waves in two parallel infinite linear point-scatterer arrays

Ioannis Chremmos and George Fikioris  »View Author Affiliations


JOSA A, Vol. 28, Issue 6, pp. 962-969 (2011)
http://dx.doi.org/10.1364/JOSAA.28.000962


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Abstract

Traveling waves in two coupled parallel infinite linear point-scatterer arrays are studied analytically for the first time to our knowledge. The two arrays are considered to be generally offset in the axial direction. It is found that slow quasi-even/odd supermodes are supported, as a result of the coupling-induced splitting of the modes of the single array, in direct analogy to standard optical waveguide couplers. Exactly even/odd supermodes are supported when the axial offset is zero. Mode splitting, dispersion curves, and coupling length are numerically investigated versus the inter-element spacing, the inter-array distance, and the axial offset. Potential applications of the concept are in directional optical couplers made of metallic or dielectric nanoparticle chains.

© 2011 Optical Society of America

OCIS Codes
(230.7020) Optical devices : Traveling-wave devices
(290.4210) Scattering : Multiple scattering
(290.5850) Scattering : Scattering, particles
(130.5296) Integrated optics : Photonic crystal waveguides
(050.6624) Diffraction and gratings : Subwavelength structures
(070.7345) Fourier optics and signal processing : Wave propagation

ToC Category:
Optical Devices

History
Original Manuscript: December 6, 2010
Revised Manuscript: March 16, 2011
Manuscript Accepted: March 18, 2011
Published: May 6, 2011

Citation
Ioannis Chremmos and George Fikioris, "Traveling waves in two parallel infinite linear point-scatterer arrays," J. Opt. Soc. Am. A 28, 962-969 (2011)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-28-6-962


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  34. We would like to note that, in the Appendix of , energy arguments are provided to show that linear arrays of generalized radiating elements can support only slow modes, provided that the far-field pattern of a single element does not have nulls with respect to the polar angle. These arguments apply to our case too, where the two offset elements of each period can be viewed as a single super-element. However, we believe that a more rigorous derivation of this result is still lacking.

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