M. Auslender, D. Levy, and S. Hava, Design and analysis of antireflection grating structure for solar energy absorber, in Optical Materials Technology for Energy Efficiency and Solar Energy Conversion, Proc. SPIE 3138, pp.160-165, 1997.

G. Bao and E. Bonnetier, Optimal Design of Periodic Diffractive Structures, Applied Mathematics and Optimization, vol.43, issue.2, pp.103-116, 2001.
DOI : 10.1007/s00245-001-0004-z

G. Bao, D. C. Dobson, and J. A. Cox, Mathematical studies in rigorous grating theory, Journal of the Optical Society of America A, vol.12, issue.5, pp.12-1029, 1995.
DOI : 10.1364/JOSAA.12.001029

P. G. Ciarlet, The Finite Element Method for Elliptic Problems, 1978.

D. C. Dobson, Optimal design of periodic antireflective structures for the Helmholtz equation, European Journal of Applied Mathematics, vol.22, issue.04, pp.321-340, 1993.
DOI : 10.1002/cpa.3160390107

D. C. Dobson, Optimal Shape Design of Blazed Diffraction Gratings, Applied Mathematics and Optimization, vol.40, issue.1, pp.61-78, 1999.
DOI : 10.1007/s002459900116

A. B. Harker and J. F. Denatale, <title>Diamond gradient index "moth-eye" antireflection surfaces for LWIR windows</title>, Window and Dome Technologies and Materials III, pp.261-267, 1992.
DOI : 10.1117/12.130803

L. Hörmander, Linear Partial Differential Operators, 1969.

L. Nirenberg, Uniqueness in Cauchy problems for differential equations with constant leading coefficients, Communications on Pure and Applied Mathematics, vol.3, issue.1, pp.89-105, 1957.
DOI : 10.1002/cpa.3160100104

R. Petit and E. , Electromagnetic Theory of Gratings, Topics in Current Physics, vol.22, 1980.
DOI : 10.1007/978-3-642-81500-3

R. Petit and G. Bouchitté, <title>Replacement Of A Very Fine Grating By A Stratified Layer : Homogenization Techniques, And The Multiple-Scale Method</title>, Application and Theory of Periodic Structures, Diffraction Gratings, and Moire Phenomena III, pp.25-31, 1988.
DOI : 10.1117/12.941729