Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible region
Abstract A novel boomerang-like alumina based antireflective coating with ultra-low reflectance has been produced for light incidence angles form 0 up to 45°. Boomerang-like alumina nanostructures have been fabricated on the BK7 glass substrates by dip-coating and surface modification via hot water...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-01-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-04928-2 |
| _version_ | 1798016292074029056 |
|---|---|
| author | MirKazem Omrani Mohammad Malekmohammad Hosein Zabolian |
| author_facet | MirKazem Omrani Mohammad Malekmohammad Hosein Zabolian |
| author_sort | MirKazem Omrani |
| collection | DOAJ |
| description | Abstract A novel boomerang-like alumina based antireflective coating with ultra-low reflectance has been produced for light incidence angles form 0 up to 45°. Boomerang-like alumina nanostructures have been fabricated on the BK7 glass substrates by dip-coating and surface modification via hot water treatment. To achieve the lowest residual reflectance, the effect of dip-coating rate and hot-water temperature in the treatment process has been investigated and optimized. To further investigate the boomerang-like alumina nanostructure and extract its graded refractive index profile by fitting the measured reflectance spectrum with the simulated one, a simulation based on the finite-difference time-domain (FDTD) method has been performed. The average reflectance measured at normal incidence for double-sided coated BK7 glass substrates is only 0.3% in the visible spectral region. Considering both sides, the average reflectance of the substrate decreased in the spectral range of 400–700 nm down to 0.4% at incidence angles of 45° by applying the boomerang-like alumina antireflection coatings. The optimized single layer boomerang-like alumina coating on the curved aspheric lens exhibited a low average reflectance of less than 0.14% and an average transmittance of above 99.3% at normal incidence. The presented process is a simple and cost-effective route towards broadband and omnidirectional antireflection coatings, which have promising potential to be applied on substrates having large scales with complex geometric shapes. |
| first_indexed | 2024-04-11T15:48:37Z |
| format | Article |
| id | doaj.art-e1f98c6c8dcf4457b98414e7d977c07a |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T15:48:37Z |
| publishDate | 2022-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-e1f98c6c8dcf4457b98414e7d977c07a2022-12-22T04:15:27ZengNature PortfolioScientific Reports2045-23222022-01-011211810.1038/s41598-022-04928-2Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible regionMirKazem Omrani0Mohammad Malekmohammad1Hosein Zabolian2Department of Physics, University of IsfahanDepartment of Physics, University of IsfahanDepartment of Physics, University of IsfahanAbstract A novel boomerang-like alumina based antireflective coating with ultra-low reflectance has been produced for light incidence angles form 0 up to 45°. Boomerang-like alumina nanostructures have been fabricated on the BK7 glass substrates by dip-coating and surface modification via hot water treatment. To achieve the lowest residual reflectance, the effect of dip-coating rate and hot-water temperature in the treatment process has been investigated and optimized. To further investigate the boomerang-like alumina nanostructure and extract its graded refractive index profile by fitting the measured reflectance spectrum with the simulated one, a simulation based on the finite-difference time-domain (FDTD) method has been performed. The average reflectance measured at normal incidence for double-sided coated BK7 glass substrates is only 0.3% in the visible spectral region. Considering both sides, the average reflectance of the substrate decreased in the spectral range of 400–700 nm down to 0.4% at incidence angles of 45° by applying the boomerang-like alumina antireflection coatings. The optimized single layer boomerang-like alumina coating on the curved aspheric lens exhibited a low average reflectance of less than 0.14% and an average transmittance of above 99.3% at normal incidence. The presented process is a simple and cost-effective route towards broadband and omnidirectional antireflection coatings, which have promising potential to be applied on substrates having large scales with complex geometric shapes.https://doi.org/10.1038/s41598-022-04928-2 |
| spellingShingle | MirKazem Omrani Mohammad Malekmohammad Hosein Zabolian Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible region Scientific Reports |
| title | Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible region |
| title_full | Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible region |
| title_fullStr | Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible region |
| title_full_unstemmed | Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible region |
| title_short | Wide-angle broadband antireflection coatings based on boomerang-like alumina nanostructures in visible region |
| title_sort | wide angle broadband antireflection coatings based on boomerang like alumina nanostructures in visible region |
| url | https://doi.org/10.1038/s41598-022-04928-2 |
| work_keys_str_mv | AT mirkazemomrani wideanglebroadbandantireflectioncoatingsbasedonboomeranglikealuminananostructuresinvisibleregion AT mohammadmalekmohammad wideanglebroadbandantireflectioncoatingsbasedonboomeranglikealuminananostructuresinvisibleregion AT hoseinzabolian wideanglebroadbandantireflectioncoatingsbasedonboomeranglikealuminananostructuresinvisibleregion |