Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5025317 | Optik - International Journal for Light and Electron Optics | 2017 | 10 Pages |
Abstract
The polarization-dependent reflection properties of single-layer antireflection coatings (ARCs) on transparent substrates at oblique-incidence are examined in detail. This includes the intensity reflectances |Rp|2and |Rs|2for incident p- and s-polarized light as functions of angle of incidence Ï and substrate refractive index n2. For unpolarized or circularly polarized light incident at Ï = 45°, we find that the average reflectance is < 2.5% for all values of n2 < 10. The reflectance differenceRD=|Rs|2â|Rp|2exhibits a maximum near Ï = 80°, whose magnitude and exact location are functions of n2. At Ï = 45°, the RD is a function of n2 that has its own peak of 0.009 at n2 â 2.0. A non-trivial differential reflection phase shift Π= δp â δs near-normal incidence (Ï = 0.1°) is calculated as a function of n2. Finally, the principal angle, principal azimuth, and second Brewster angle that are usually defined for bare absorbing substrates, are determined for single-layer ARCs on transparent substrates as functions of n2.
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Authors
R.M.A. Azzam,