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Updated: Jun 11, 2026
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Antireflection coatings for multilayer-type photonic crystals
Yasuo Ohtera1, Daniel Kurniatan, Hirohito Yamada
1Department of Electrical Engineering, Graduate School of Engineering, Tohoku University Aramaki-Aza-Aoba 6-6-05, Sendai 980-8579 Japan. ohtera@ecei.tohoku.ac.jp
Optics Express
|July 1, 2010
Summary
This study shows that double-layer antireflection (AR) coatings can effectively reduce reflectivity on wavy dielectric multilayers. This performance is comparable to traditional flat coatings, even with sub-wavelength structural modifications.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Dielectric multilayers are crucial optical components.
- Sub-wavelength structural modifications offer advanced functionalities.
- Antireflection (AR) coatings minimize light reflection for improved performance.
Purpose of the Study:
- To investigate the feasibility of AR coatings on dielectric multilayers with sub-wavelength structural modifications.
- To evaluate the effectiveness of double-layer AR coatings on wavy multilayers.
- To determine the impact of structural modifications on AR coating performance.
Main Methods:
- Numerical simulations were employed to analyze reflectivity.
- The study focused on double-layer AR coatings applied to wavy dielectric multilayers on patterned substrates.
- Performance was assessed across a range of horizontal pitch variations.
Main Results:
- Double-layer AR coatings are viable for wavy dielectric multilayers.
- Performance levels are comparable to conventional flat multilayer coatings.
- AR coatings effectively function across diverse horizontal pitch values.
Conclusions:
- Sub-wavelength structural modifications in dielectric multilayers do not hinder AR coating effectiveness.
- Double-layer AR coatings provide a robust solution for reducing reflectivity in patterned optical structures.
- The findings support the integration of structural modifications with advanced AR coating designs.
