Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/116316
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Type: | Journal article |
Title: | Light-confining nanoporous anodic alumina microcavities by apodized stepwise pulse anodization |
Author: | Law, S. Lim, S. Macalincag, R. Abell, A.D. Santos, A. |
Citation: | ACS Applied Nano Materials, 2018; 1(9):4418-4434 |
Publisher: | American Chemical Society |
Issue Date: | 2018 |
ISSN: | 2574-0970 2574-0970 |
Statement of Responsibility: | Cheryl Suwen Law, Yee Lim, Raeanne M. Macalincag, Andrew D. Abell, and Abel Santos |
Abstract: | This study presents an innovative approach to fabricate nanoporous anodic alumina optical microcavities (NAA-μCVs) with enhanced quality factor and versatile optical properties. An apodization strategy using a logarithmic negative function is applied to a stepwise pulse anodization process in order to engineer the effective medium of NAA so that it confines light efficiently. The architecture of these light-trapping photonic crystals is composed of two highly reflecting mirrors with an asymmetrically apodized effective medium. Various anodization parameters such as the anodization time, anodization period, current density offset, and pore-widening time are systematically modified to assess their effect on the optical properties of NAA-μCVs in terms of the quality factor and position of the resonance band. We demonstrate that this fabrication approach enables the generation of NAA-μCVs with a high quality factor (∼113) and well-resolved and tunable resonance bands across the spectral regions, from UV to near-IR, through manipulation of the anodization parameters. These results represent a comprehensive rationale for the development of high-quality NAA-μCVs with enhanced light-confining capabilities, providing new opportunities for further fundamental and applied research across a broad range of fields and disciplines such as photonics and optical sensing. |
Keywords: | Nanoporous anodic alumina; optical microcavity; light confinement; apodized anodization; quality factor |
Rights: | © 2018 American Chemical Society |
DOI: | 10.1021/acsanm.8b00494 |
Grant ID: | http://purl.org/au-research/grants/arc/DE140100549 http://purl.org/au-research/grants/arc/CE140100003 |
Published version: | http://dx.doi.org/10.1021/acsanm.8b00494 |
Appears in Collections: | Aurora harvest 8 IPAS publications |
Files in This Item:
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hdl_116316.pdf | Accepted version | 3.34 MB | Adobe PDF | View/Open |
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