Abstract

Inductive wire grids with square-shaped holes on a thin finitely conducting metal screen are examined by rigorous three-dimensional electromagnetic diffraction theory in the region where the optical wavelength is comparable with the grid period. Spectral transmittance and reflectance curves are computed, considering the selection of the metal, the properties of the grid (metal-layer thicknesses, fill factor, aperture shape), and the angle of incidence. High-performance polarization-independent short-wavelength pass filters are designed for near-infrared and visible light. The importance of finite conductivity is demonstrated, and Al appears to be the best metal in this spectral region.

© 1998 Optical Society of America

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References

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  1. H. Tamada, T. Doumuki, T. Yamaguchi, S. Matsumoto, “Al wire-grid polarizer using the s-polarization resonance effect at the 0.8-µm-wavelength band,” Opt. Lett. 22, 419–421 (1997).
    [CrossRef] [PubMed]
  2. R. C. McPhedran, G. H. Derrick, L. C. Botten, “Theory of crossed gratings,” in Electromagnetic Theory of Gratings, R. Petit, ed. (Springer-Verlag, Berlin, 1980).
  3. E. Noponen, J. Turunen, “Eigenmode method for electromagnetic synthesis of diffractive elements with three-dimensional profiles,” J. Opt. Soc. Am. A 11, 2494–2502 (1994).
    [CrossRef]
  4. L. Li, “New formulation of the Fourier modal method for crossed surface-relief gratings,” J. Opt. Soc. Am. A 14, 2758–2767 (1997).
    [CrossRef]
  5. R. C. Weast, ed., CRC Handbook of Chemistry and Physics, 64th ed. (CRC Press, Boca Raton, Fla., 1984), p. E-369.
  6. R. C. McPhedran, D. Maystre, “On the theory and solar application of inductive grids,” Appl. Phys. 14, 1–20 (1977).
    [CrossRef]

1997 (2)

1994 (1)

1977 (1)

R. C. McPhedran, D. Maystre, “On the theory and solar application of inductive grids,” Appl. Phys. 14, 1–20 (1977).
[CrossRef]

Botten, L. C.

R. C. McPhedran, G. H. Derrick, L. C. Botten, “Theory of crossed gratings,” in Electromagnetic Theory of Gratings, R. Petit, ed. (Springer-Verlag, Berlin, 1980).

Derrick, G. H.

R. C. McPhedran, G. H. Derrick, L. C. Botten, “Theory of crossed gratings,” in Electromagnetic Theory of Gratings, R. Petit, ed. (Springer-Verlag, Berlin, 1980).

Doumuki, T.

Li, L.

Matsumoto, S.

Maystre, D.

R. C. McPhedran, D. Maystre, “On the theory and solar application of inductive grids,” Appl. Phys. 14, 1–20 (1977).
[CrossRef]

McPhedran, R. C.

R. C. McPhedran, D. Maystre, “On the theory and solar application of inductive grids,” Appl. Phys. 14, 1–20 (1977).
[CrossRef]

R. C. McPhedran, G. H. Derrick, L. C. Botten, “Theory of crossed gratings,” in Electromagnetic Theory of Gratings, R. Petit, ed. (Springer-Verlag, Berlin, 1980).

Noponen, E.

Tamada, H.

Turunen, J.

Yamaguchi, T.

Appl. Phys. (1)

R. C. McPhedran, D. Maystre, “On the theory and solar application of inductive grids,” Appl. Phys. 14, 1–20 (1977).
[CrossRef]

J. Opt. Soc. Am. A (2)

Opt. Lett. (1)

Other (2)

R. C. McPhedran, G. H. Derrick, L. C. Botten, “Theory of crossed gratings,” in Electromagnetic Theory of Gratings, R. Petit, ed. (Springer-Verlag, Berlin, 1980).

R. C. Weast, ed., CRC Handbook of Chemistry and Physics, 64th ed. (CRC Press, Boca Raton, Fla., 1984), p. E-369.

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Figures (3)

Fig. 1
Fig. 1

Geometry of a self-supporting inductive grid of period d×d: an array of square holes (size c×c, c<d) pierced in a metallic screen of thickness h.

Fig. 2
Fig. 2

Spectral transmittance and reflectance of an inductive Al grid with (a) rectangular and (b) circular apertures of fill factor f=0.77.

Fig. 3
Fig. 3

Dependence of the transmittance at λ=500 nm and λ =1000 nm on (a) the fill factor f, (b) the grid thickness h, and (c) the angle of incidence θ for a grid with rectangular apertures.

Tables (1)

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Table 1 Transmittance of Inductive Grids for Various Metals at Different Wavelengths λa

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