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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 72, Iss. 7 — Jul. 1, 1982
  • pp: 839–846

Multicoated gratings: a differential formalism applicable in the entire optical region

J. Chandezon, M. T. Dupuis, G. Cornet, and D. Maystre  »View Author Affiliations

JOSA, Vol. 72, Issue 7, pp. 839-846 (1982)

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We present a new formalism for the diffraction of an electromagnetic plane wave by a multicoated grating. Its basic feature lies in the use of a coordinate system that maps all the interfaces onto parallel planes. Using Maxwell’s equations in this new system leads to a linear system of differential equations with constant coefficients whose solution is obtained through the calculation of the eigenvalues and eigenvectors of a matrix in each medium. Through classical criteria, our numerical results have been found generally to be accurate to within 1%. The serious numerical difficulties encountered by the previous differential formalism for highly conducting metallic gratings completely disappear, whatever the optical region. Furthermore, our computer code provides accurate results for metallic gratings covered by many modulated dielectric coatings or for highly modulated gratings. We give two kinds of applications. The first concerns the use of dielectric coatings on a modulated metallic substrate to minimize the absorption of energy. Conversely, the second describes the use of highly modulated metallic gratings to increase this absorption.

© 1982 Optical Society of America

J. Chandezon, M. T. Dupuis, G. Cornet, and D. Maystre, "Multicoated gratings: a differential formalism applicable in the entire optical region," J. Opt. Soc. Am. 72, 839-846 (1982)

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  1. R. Petit, ed., Electromagnetic Theory of Gratings (Springer-Verlag, Berlin, 1980): R. Petit, Chap. 1, pp. 1–52; D. Maystre, Chap. 3, pp. 63–100; P. Vincent, Chap. 4, pp. 101–121.
  2. J. Chandezon, D. Maystre, and G. Raoult, "A new theoretical method for diffraction gratings and its numerical application," J. Opt. (Paris) 11, 235–241 (1980).
  3. E. J. Post, Formal structure of Electromagnetics (North-Holland, Amsterdam, 1962), pp. 144–159.
  4. D. Maystre, J. P. Laude, P. Gacoin, D. Lepère, and J. P. Priou, "Gratings for tunable lasers: using multidielectric coatings to improve their efficiency," Appl. Opt. 19, 3099–3102 (1980).
  5. D. Maystre, M. Nevière, and R. Petit, in Electromagnetic Theory Of Gratings, R. Petit, ed. (Springer-Verlag, Berlin, 1980), Chap. 6, pp. 159–225.
  6. J. Chandezon, "Les equatians de Maxwell sous forme covariante. Application à l'étude de la propagation dans les guides periodques et à la diffraction par les reseaux," Ph.D. Thesis (Clermont-Ferrand University, Aubiere, France, 1979).
  7. In this usual mounting, there is a certain value of n for which the nth-diffracted wave and the incident wave are propagating in opposite directions, so βn = βo.
  8. D. Maystre, "A new general integral theory for dielectric coated gratings," J. Opt. Soc. Am. 68, 490–495 (1978).
  9. M. Nevière, P. Vincent, and R. Petit, "Theory of conducting gratings and their applications to optics," Nouv. Rev. Opt. 5, 65–77 (1974).
  10. G. H. Derrick, R. C. McPhedran, D. Maystre, and M. Nevière, "Crossed gratings: a theory and its applications," Appl. Phys. 18, 39–51 (1979).
  11. R. C. McPhedran, G. H. Derrick, and L. C. Botten, in Electro-magnetic Theory of Gratings, R. Petit, ed. (Springer-Verlag, Berlin, 1980), Chap. 7, pp. 227–276.
  12. P. B. Clapham and M. C. Hutley, "Reduction of lens reflexion by the 'moth eye' principle," Nature 244, 281–282 (1973).
  13. D. Maystre, M. Cadilhac, and J. Chandezon, "Gratings: a phenomenological approach and its applications, perfect blazing in a non-zero deviation mounting," Opt. Acta 28, 457–470 (1981).

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