Abstract
A formalism is presented for calculating the ordinary and extraordinary refractive indices for a uniaxial film with optical properties equivalent to those of a conically mounted zeroth-order lamellar grating. In the quasi-static limit (grating-period-to-wavelength ratio → 0) this treatment is exact for both dielectric and metallic gratings. For period-to-wavelength ratios approaching unity, the effective anisotropic refractive indices are dependent on the polar and azimuthal incidence angles. The validity of this method as the period-to-wavelength ratio increases is studied by comparison of the method with the predictions of rigorous grating theories. Comparisons are then made with the predictions of other effective-medium theories. Examples of the use of this theory for conically mounted zeroth-order gratings are presented.
© 1993 Optical Society of America
Full Article | PDF ArticleMore Like This
Philippe Lalanne and Jean-Paul Hugonin
J. Opt. Soc. Am. A 15(7) 1843-1851 (1998)
Gene Campbell and Raymond K. Kostuk
J. Opt. Soc. Am. A 12(5) 1113-1117 (1995)
S. Campbell, L. C. Botten, R. C. McPhedran, and C. Martijn de Sterke
J. Opt. Soc. Am. A 26(4) 938-948 (2009)