http://scholars.ntou.edu.tw/handle/123456789/1759
標題: | Ultra-High Refractive Index Sensing Structure Based on a Metal-Insulator-Metal Waveguide-Coupled T-Shape Cavity with Metal Nanorod Defects | 作者: | Yuan-Fong Chou Chau Chung-Ting Chou Chao Hung Ji Huang N. T. R. N. Kumara Chee Ming Lim Hai-Pang Chiang |
關鍵字: | plasmonics;metal–insulator–metal;finite element method;nanorod defects;sensitivity;T-shape cavity;refractive index sensor;temperature sensor | 公開日期: | 10-十月-2019 | 卷: | 9 | 期: | 10 | 起(迄)頁: | 1433 | 來源出版物: | Nanomaterials | 摘要: | An ultra-high plasmonic refractive index sensing structure composed of a metal–insulator–metal (MIM) waveguide coupled to a T-shape cavity and several metal nanorod defects is proposed and investigated by using finite element method. The designed plasmonic MIM waveguide can constitute a cavity resonance zone and the metal nanorod defects can effectively trap the light in the T-shape cavity. The results reveal that both the size of defects in wider rectangular cavity and the length of narrower rectangular cavity are primary factors increasing the sensitivity performance. The sensitivity can achieve as high as 8280 nm/RIU (RIU denotes the refractive index unit), which is the highest sensitivity reported in plasmonic MIM waveguide-based sensors to our knowledge. In addition, the proposed structure can also serve as a temperature sensor with temperature sensitivity as high as 3.30 nm/°C. The designed structure with simplicity and ease of fabrication can be applied in sensitivity nanometer scale refractive index sensor and may potentially be used in optical on-chip nanosensor. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/1759 | DOI: | 10.3390/nano9101433 |
顯示於: | 光電與材料科技學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。