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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 19, Iss. 10 — Oct. 1, 2002
  • pp: 2437–2448

Scattering enhancement from an array of interacting dipoles near a planar waveguide

Brian J. Soller and Dennis G. Hall  »View Author Affiliations


JOSA B, Vol. 19, Issue 10, pp. 2437-2448 (2002)
http://dx.doi.org/10.1364/JOSAB.19.002437


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Abstract

We develop a theory for light scattering from a random array of nanoparticles spaced much less than an optical wavelength from an optical waveguide. We deal with the randomness in the particle positions by convolving the single-particle Green’s dyadic with a correlation function that describes the average properties of the particle distribution. This allows us to treat free-space and substrate-mediated particle–particle interactions. We show that coherent interactions between particles near a waveguide cause dramatic, qualitative changes to the particle susceptibilities. Hence, the scattering spectra show strong, surface-induced peaks that we associate with the onset of leaky guided waves of the layered substrate. Our predictions produce outstanding agreement with the scattering experiments of Stuart and Hall [Phys. Rev. Lett. 80, 5663 (1998)].

© 2002 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(290.4210) Scattering : Multiple scattering
(290.5850) Scattering : Scattering, particles
(310.2790) Thin films : Guided waves

Citation
Brian J. Soller and Dennis G. Hall, "Scattering enhancement from an array of interacting dipoles near a planar waveguide," J. Opt. Soc. Am. B 19, 2437-2448 (2002)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-19-10-2437

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