Enhancing the plasmonic component of photonic-plasmonic resonances in self-assembled dielectric spheres on Ag
- 주제(기타) Materials Science, Multidisciplinary
- 주제(기타) Physics, Applied
- 설명문(일반) [Moon, Cheon Woo; Kim, Geonyoung; Hyun, Jerome Kartham] Ewha Womans Univ, Dept Chem & Nanosci, 52 Ewhayeodae Gil, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 ROYAL SOC CHEMISTRY
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000181396
- 본문언어 영어
- Published As http://dx.doi.org/10.1039/d0tc05742h
초록/요약
Photonic-plasmonic platforms consisting of dielectric sphere monolayer arrays on a plasmonic substrate have been a popular testbed for studying the hybridization of modes between dielectric and plasmonic resonances. As the plasmonic field can be used to enhance a variety of optical signals from photochemical processes, maximizing the plasmonic component is of practical interest. Herein, a modified self-assembly method at an air-liquid interface was introduced to prepare a large-scale homogeneous array of polystyrene (PS) spheres on Ag supporting photonic-plasmonic resonances in the visible range. A thin Ag coating and TiO2 film were introduced above and below the array, respectively, to tailor the spectral and spatial field characteristics such that strongly enhanced plasmonic fields could be realized. This design results in plasmonic near-field intensities that are similar to 6-fold stronger than previously reported designs without the two structural additions. The simplicity and low cost of the platform provide practical routes for modulating the plasmonic contribution in hybrid resonances for optical signal-enhancing applications such as in biosensing and fluorescence spectroscopy.
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