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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 31 — Nov. 1, 2003
  • pp: 6255–6260

All-Dielectric Reflection Gratings: A Study of the Physical Mechanism for Achieving High Efficiency

Hongbo Wei and Lifeng Li  »View Author Affiliations


Applied Optics, Vol. 42, Issue 31, pp. 6255-6260 (2003)
http://dx.doi.org/10.1364/AO.42.006255


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Abstract

The physical mechanism for the all-dielectric reflection gratings to achieve high efficiency in the −1st-order Littrow mounting is studied. The all-dielectric gratings consist of two parts, a surface-relief grating and a highly reflecting dielectric stack. The surface-relief grating sits on top of the reflecting stack. A simple analytical expression for diffraction efficiency is obtained in terms of the S-matrix elements of the two parts. By analyzing the expression we show that the diffraction can be interpreted as the interference of a symmetric wave and an antisymmetric wave. The conditions for achieving high diffraction efficiency are also identified. The analytical results are illustrated by numerical computations.

© 2003 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1940) Diffraction and gratings : Diffraction
(050.1950) Diffraction and gratings : Diffraction gratings
(050.2770) Diffraction and gratings : Gratings
(310.0310) Thin films : Thin films

Citation
Hongbo Wei and Lifeng Li, "All-Dielectric Reflection Gratings: A Study of the Physical Mechanism for Achieving High Efficiency," Appl. Opt. 42, 6255-6260 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-31-6255

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