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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 9 — Sep. 1, 2010
  • pp: 1828–1832

Topology optimization of grating couplers for the efficient excitation of surface plasmons

Jacob Andkjær, Shinji Nishiwaki, Tsuyoshi Nomura, and Ole Sigmund  »View Author Affiliations


JOSA B, Vol. 27, Issue 9, pp. 1828-1832 (2010)
http://dx.doi.org/10.1364/JOSAB.27.001828


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Abstract

We propose a methodology for a systematic design of grating couplers for efficient excitation of surface plasmons at metal–dielectric interfaces. The methodology is based on a two-dimensional topology optimization formulation based on the H-polarized scalar Helmholtz equation and finite-element method simulations. The efficiency of the method is demonstrated by optimized designs for input and output grating couplers for an Ag-SiO 2 interface. The results indicate that slanted grove gratings may raise the coupling efficiency above 68% where the highest previously reported value was 50%.

© 2010 Optical Society of America

OCIS Codes
(050.1590) Diffraction and gratings : Chirping
(050.2770) Diffraction and gratings : Gratings
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Diffraction and Gratings

History
Original Manuscript: June 15, 2010
Manuscript Accepted: June 26, 2010
Published: August 18, 2010

Citation
Jacob Andkjær, Shinji Nishiwaki, Tsuyoshi Nomura, and Ole Sigmund, "Topology optimization of grating couplers for the efficient excitation of surface plasmons," J. Opt. Soc. Am. B 27, 1828-1832 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-9-1828

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