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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. 31, Iss. 8 — Aug. 1, 2014
  • pp: 1692–1697

Optics InfoBase > JOSA A > Page 1692

Electromagnetic modelization of spherical focusing on a one-dimensional grating thanks to a conical B-spline modal method

Paul Chevalier, Patrick Bouchon, Fabrice Pardo, and Riad Haïdar  »View Author Affiliations


JOSA A, Vol. 31, Issue 8, pp. 1692-1697 (2014)
http://dx.doi.org/10.1364/JOSAA.31.001692


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Abstract

Focusing light onto nanostructures thanks to spherical lenses is a first step in enhancing the field and is widely used in applications. Nonetheless, the electromagnetic response of such nanostructures, which have subwavelength patterns, to a focused beam cannot be described by the simple ray tracing formalism. Here, we present a method for computing the response to a focused beam, based on the B-spline modal method adapted to nanostructures in conical mounting. The eigenmodes are computed in each layer for both polarizations and are then combined for the computation of scattering matrices. The simulation of a Gaussian focused beam is obtained thanks to a truncated decomposition into plane waves computed on a single period, which limits the computation burden.

© 2014 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(220.1770) Optical design and fabrication : Concentrators
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(050.1965) Diffraction and gratings : Diffractive lenses
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: April 8, 2014
Revised Manuscript: June 4, 2014
Manuscript Accepted: June 12, 2014
Published: July 2, 2014

Citation
Paul Chevalier, Patrick Bouchon, Fabrice Pardo, and Riad Haïdar, "Electromagnetic modelization of spherical focusing on a one-dimensional grating thanks to a conical B-spline modal method," J. Opt. Soc. Am. A 31, 1692-1697 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-8-1692


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