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Open AccessArticle
Tunable Plasmon Resonance in Silver Nanodisk-on-Mirror Structures and Scattering Enhancement by Annealing
by
Ryohei Hatsuoka
Ryohei Hatsuoka 1,
Kota Yamasaki
Kota Yamasaki 1,
Kenji Wada
Kenji Wada 2,
Tetsuya Matsuyama
Tetsuya Matsuyama 1,* and
Koichi Okamoto
Koichi Okamoto 1,*
1
Department of Physics and Electronics, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
2
Equipment Sharing Center for Advanced Research and Innovation, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan
*
Authors to whom correspondence should be addressed.
Nanomaterials 2024, 14(19), 1559; https://doi.org/10.3390/nano14191559 (registering DOI)
Submission received: 16 August 2024
/
Revised: 21 September 2024
/
Accepted: 24 September 2024
/
Published: 26 September 2024
Abstract
In this study, we evaluated the surface plasmon characteristics of periodic silver nanodisk structures fabricated on a dielectric thin-film spacer layer on a Ag mirror substrate (NanoDisk on Mirror: NDoM) through finite difference time domain (FDTD) simulations and experiments involving actual sample fabrication. Through FDTD simulations, it was confirmed that the NDoM structure exhibits two sharp peaks in the visible range, and by adjusting the thickness of the spacer layer and the size of the nanodisk structure, sharp peaks can be obtained across the entire visible range. Additionally, we fabricated the NDoM structure using electron beam lithography (EBL) and experimentally confirmed that the obtained peaks matched the simulation results. Furthermore, we discovered that applying annealing at an appropriate temperature to the fabricated structure enables the adjustment of the resonance peak wavelength and enhances the scattering intensity by approximately five times. This enhancement is believed to result from changes in the shape and size of the nanodisk structure, as well as a reduction in grain boundaries in the metal crystal due to annealing. These results have the potential to contribute to technological advancements in various application fields, such as optical sensing and emission enhancement.
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MDPI and ACS Style
Hatsuoka, R.; Yamasaki, K.; Wada, K.; Matsuyama, T.; Okamoto, K.
Tunable Plasmon Resonance in Silver Nanodisk-on-Mirror Structures and Scattering Enhancement by Annealing. Nanomaterials 2024, 14, 1559.
https://doi.org/10.3390/nano14191559
AMA Style
Hatsuoka R, Yamasaki K, Wada K, Matsuyama T, Okamoto K.
Tunable Plasmon Resonance in Silver Nanodisk-on-Mirror Structures and Scattering Enhancement by Annealing. Nanomaterials. 2024; 14(19):1559.
https://doi.org/10.3390/nano14191559
Chicago/Turabian Style
Hatsuoka, Ryohei, Kota Yamasaki, Kenji Wada, Tetsuya Matsuyama, and Koichi Okamoto.
2024. "Tunable Plasmon Resonance in Silver Nanodisk-on-Mirror Structures and Scattering Enhancement by Annealing" Nanomaterials 14, no. 19: 1559.
https://doi.org/10.3390/nano14191559
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