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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

  • Vol. 3, Iss. 11 — Nov. 1, 1986
  • pp: 1780–1787

Rigorous coupled-wave analysis of metallic surface-relief gratings

M. G. Moharam and T. K. Gaylord  »View Author Affiliations


JOSA A, Vol. 3, Issue 11, pp. 1780-1787 (1986)
http://dx.doi.org/10.1364/JOSAA.3.001780


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Abstract

A rigorous coupled-wave analysis for metallic surface-relief gratings is presented. This approach allows an arbitrary complex permittivity to be used for the material and thus avoids the infinite conductivity (perfect-conductor) approximation. Both TE and TM polarizations and arbitrary angles of incidence are treated. Diffraction characteristics for rectangular-groove gold gratings with equal groove and ridge widths are presented for free-space wavelengths of 0.5, 1.0 and 10.0 μm for all diffracted orders as a function of period, groove depth, polarization, and angle of incidence. Results include the following: (1) TM-polarization diffraction characteristics vary more rapidly than do those for TE polarization, (2) 95% first-order diffraction efficiency occurs for TM polarization at 10.0 μm, (3) <0.1% zero-order specular reflectivity occurs for both TE and TM polarizations, (4) >50% absorption of incident power occurs at 0.5 μm, and (5) the perfect-conductor approximation is not valid for TM polarization at any of the wavelengths and is not valid for TE polarization at 0.5 μm.

© 1986 Optical Society of America

History
Original Manuscript: February 3, 1986
Manuscript Accepted: June 18, 1986
Published: November 1, 1986

Citation
M. G. Moharam and T. K. Gaylord, "Rigorous coupled-wave analysis of metallic surface-relief gratings," J. Opt. Soc. Am. A 3, 1780-1787 (1986)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-3-11-1780

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