Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Realization of high-quality optical nanoporous gradient-index filters by optimal combination of anodization conditions

Author affiliations

Abstract

High-quality nanoporous anodic alumina gradient-index filters (NAA-GIFs) are realized by sinusoidal pulse anodisation (SPA) of aluminum. A three-level factorial design of experiments is used to determine the effect of three critical anodization parameters –electrolyte temperature, concentration of the electrolyte and anodization time– on the quality of light control in these photonic crystal (PC) structures. Quantitative analysis of the effect of these anodization parameters on the quality of the characteristic photonic stopband (PSB) of NAA-GIFs reveals that all three anodization parameters and their respective combinations have statistically significant effects. However, anodization time is found to have the highest impact on the quality of light control in NAA-GIFs, followed by the electrolyte concentration and its temperature. Our findings demonstrate that NAA-GIFs fabricated under optimal conditions achieve an outstanding quality factor of ∼86 (i.e. ∼18% superior to that of other NAA-based PCs reported in the literature). This study provides new insight into optimal anodization conditions to fabricate high-quality NAA-based PC structures, opening new exciting opportunities to integrate these nanoporous PCs as platform materials for light-based technologies requiring a precise control over photons such as ultra-sensitive optical sensors and biosensors, photocatalysts for green energy generation and environmental remediation, optical encoding and lasing.

Graphical abstract: Realization of high-quality optical nanoporous gradient-index filters by optimal combination of anodization conditions

Back to tab navigation

Supplementary files

Article information


Submitted
12 Dec 2019
Accepted
23 Feb 2020
First published
24 Feb 2020

Nanoscale, 2020, Advance Article
Article type
Paper

Realization of high-quality optical nanoporous gradient-index filters by optimal combination of anodization conditions

C. S. Law, S. Y. Lim, L. Liu, A. D. Abell, L. F. Marsal and A. Santos, Nanoscale, 2020, Advance Article , DOI: 10.1039/C9NR10526C

Social activity

Search articles by author

Spotlight

Advertisements