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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 30, Iss. 12 — Dec. 1, 2013
  • pp: 2473–2481

Near-field imaging of perfectly conducting grating surfaces

Ting Cheng, Peijun Li, and Yuliang Wang  »View Author Affiliations

JOSA A, Vol. 30, Issue 12, pp. 2473-2481 (2013)

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A novel approach is presented to solving the inverse diffractive grating problem in near-field optical imaging, which is to reconstruct perfectly conducting grating surfaces with resolution beyond the diffraction limit. The grating surface is assumed to be a small and smooth deformation of a plane surface. An analytical solution of the direct grating problems is derived by using the method of transformed field expansion. Based on the analytic solution, an explicit reconstruction formula is deduced for the inverse grating problem. The method requires only a single incident field and is realized efficiently by using the fast Fourier transform. Numerical results show that the method is simple, stable, and effective in reconstructing grating surfaces with super-resolved resolution.

© 2013 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(290.3200) Scattering : Inverse scattering

ToC Category:
Diffraction and Gratings

Original Manuscript: August 23, 2013
Revised Manuscript: October 11, 2013
Manuscript Accepted: October 13, 2013
Published: November 8, 2013

Ting Cheng, Peijun Li, and Yuliang Wang, "Near-field imaging of perfectly conducting grating surfaces," J. Opt. Soc. Am. A 30, 2473-2481 (2013)

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