http://scholars.ntou.edu.tw/handle/123456789/1753
標題: | Enhancing plasmonic effect in periodic nanometal square prisms with fences and cavities for refractive index and temperature sensing applications | 作者: | Chung-Ting Chou Chao Yuan-Fong Chou Chau Hai-Pang Chiang |
關鍵字: | Surface plasmon resonance;Metal-shell square prisms;Finite element method;Plasmonic nanosensor;Sensitivity | 公開日期: | 24-九月-2020 | 卷: | 22 | 起(迄)頁: | 297 | 來源出版物: | Journal of Nanoparticle Research | 摘要: | This paper investigates the enhancing plasmonic effect of periodic arrays of silver-shell square prisms employing a three-dimensional finite element method for refractive index and temperature sensing applications in the near-infrared region. We found that the connected metal-shell square prisms could simultaneously generate surface, gap, and cavity plasmon resonances modes in a single structure and remarkably enhance the sensing performance. The proposed design, constructed using silver-shell square prisms with linked fences, as a plasmon resonance source in the center of the unit cell, can sense refractive index and temperature with outstanding sensitivity as 940 nm/RIU and 0.5 nm/°C, respectively. Simulation results reveal that the proposed structure’s absorptance is approximately perfect, significantly larger than its concrete counterpart without the center cavity and linked fences. The proposed system has a strong dipolar effect generated from the mutual inductance on metal and coupled fences, and the capacitive coupling in cavity regions of nanostructures. These distinctive advantages enable the linkage-based plasmonic sensor, a multi-functional biosensor, and a potential label-free photonic device. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/1753 | ISSN: | 1388-0764 | DOI: | 10.1007/s11051-020-05023-1 |
顯示於: | 光電與材料科技學系 |
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