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Anisotropic antireflection coatings: design and fabrication
1Department of Physics, University of Otago, P.O. Box 56, Dunedin, New Zealand.
Optics Letters
|December 20, 2007
Summary
Researchers developed novel anisotropic antireflection coatings using birefringent materials like zirconium oxide. These coatings are antireflecting for p-polarized light and reflecting for s-polarized light, with potential laser applications.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Traditional antireflection coatings often lack polarization selectivity.
- Controlling light polarization is crucial for various optical devices.
Purpose of the Study:
- To design and fabricate coatings with specific polarization-dependent reflectance properties.
- To achieve antireflection for p-polarized light and reflection for s-polarized light simultaneously.
Main Methods:
- Utilized a single birefringent material, obliquely deposited zirconium oxide, for coating fabrication.
- Engineered a six-layer anisotropic antireflection coating structure.
Main Results:
- Demonstrated a six-layer zirconium oxide coating with R(p) = 0.2% and R(s) = 4.9%.
- Achieved significant differentiation in reflectance for orthogonal polarizations.
Conclusions:
- Obliquely deposited birefringent coatings offer a viable route to polarization-selective optical filters.
- These coatings show promise for polarization-selection devices in laser systems.
