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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. 16, Iss. 5 — May. 1, 1999
  • pp: 1157–1167

Design of binary subwavelength diffractive lenses by use of zeroth-order effective-medium theory

Joseph N. Mait, Dennis W. Prather, and Mark S. Mirotznik  »View Author Affiliations


JOSA A, Vol. 16, Issue 5, pp. 1157-1167 (1999)
http://dx.doi.org/10.1364/JOSAA.16.001157


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Abstract

A procedure for designing binary diffractive lenses by use of pulse-width-modulated subwavelength features is discussed. The procedure is based on the combination of two approximate theories, effective-medium theory and scalar diffraction theory, and accounts for limitations on feature size and etch depth imposed by fabrication. We use a closed-form expression based on zeroth-order effective-medium theory to map the desired superwavelength phase to the width of a binary subwavelength feature and to examine the requirements imposed by this technique on fabrication and on analysis. Comparisons are also made to more rigorous approaches. In making these comparisons, we show that a trade-off exists between the exactness of the mapping and the fabrication constraints on the minimum feature.

© 1999 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(050.1960) Diffraction and gratings : Diffraction theory
(050.1970) Diffraction and gratings : Diffractive optics
(220.3620) Optical design and fabrication : Lens system design
(220.3630) Optical design and fabrication : Lenses
(260.2110) Physical optics : Electromagnetic optics

Citation
Joseph N. Mait, Dennis W. Prather, and Mark S. Mirotznik, "Design of binary subwavelength diffractive lenses by use of zeroth-order effective-medium theory," J. Opt. Soc. Am. A 16, 1157-1167 (1999)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-16-5-1157

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