Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/138094
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Type: | Journal article |
Title: | Generation of Tamm Plasmon Resonances for Light Confinement Applications in Narrowband Gradient-Index Filters Based on Nanoporous Anodic Alumina |
Author: | Rojas Gómez, A. Acosta, L.K. Ferré-Borrull, J. Santos, A. Marsal, L.F. |
Citation: | ACS Applied Nano Materials, 2023; 6(7):5274-5283 |
Publisher: | American Chemical Society (ACS) |
Issue Date: | 2023 |
ISSN: | 2574-0970 2574-0970 |
Statement of Responsibility: | Alejandro Rojas Gómez, Laura K. Acosta, Josep Ferré-Borrull, Abel Santos, and Lluis F. Marsal |
Abstract: | Gold-coated gradient-index filters based on nanoporous anodic alumina (Au-coated NAA−GIFs) were used as model platforms to elucidate how Tamm plasmons can be tailored by engineering the geometric features of the plasmonic and photonic components of these hybrid structures. NAA−GIFs with well-resolved, intense photonic stopbands at two positions of the visible spectrum were fabricated through sinusoidal pulse anodization. These model photonic crystals were used to assess how the quality of Tamm plasmon resonances can be enhanced by tuning the features of the dielectric mirror and the thickness of the porous gold coating layer. It is found that the highest value of the quality factor of Tamm resonance (QTamm = 237) is obtained for 11 nm of gold on a dielectric mirror with low porosity corresponding to the resonant spectral position of λTamm of ∼698 nm. Our analysis indicates that Tamm resonances in asproduced Au-coated NAA−GIFs are weak due to the constrained range of wavelengths (narrow bands) at which these photonic crystal structures reflect light. However, after broadening of their photonic stopband upon pore widening, Tamm resonances become better resolved, with higher intensity. It is also observed that the quality of light confinement worsens progressively with the thickness of the porous gold coating layer after a critical value. In contrast to conventional surface plasmon resonance systems, this hybrid Tamm porous system does not require complex coupling systems and provides a nanoporous structure that can be readily tailored for a range of photonic technologies such as sensing and lasing. |
Keywords: | nanoporous anodic alumina; gradient-index filters; Tamm plasmon resonance; photonic crystal; plasmonic−photonic hybrid structure |
Rights: | © 2023 The Authors. Published by American Chemical Society. This article is open access and uses a Creative Commons public use license, e.g., CC-BY or CC-BY-NC-ND, rights and permissions questions should be directed to Creative Commons. Contact information can be found on their website at https://creativecommons.org/about/contact |
DOI: | 10.1021/acsanm.2c05356 |
Grant ID: | http://purl.org/au-research/grants/arc/DP200102614 http://purl.org/au-research/grants/arc/DP220102857 |
Published version: | http://dx.doi.org/10.1021/acsanm.2c05356 |
Appears in Collections: | Chemical Engineering publications |
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hdl_138094.pdf | Published version | 5.36 MB | Adobe PDF | View/Open |
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