標題: | High-Performance Plasmonic Nanolasers with a Nanotrench Defect Cavity for Sensing Applications |
作者: | Cheng, Pi-Ju Huang, Zhen-Ting Li, Jhu-Hong Chou, Bo-Tsun Chou, Yu-Hsun Lo, Wei-Cheng Chen, Kuo-Ping Lu, Tien-Chang Lin, Tzy-Rong 影像與生醫光電研究所 光電工程學系 Institute of Imaging and Biomedical Photonics Department of Photonics |
關鍵字: | surface plasmon resonance;nanolasers;optical sensors;sensitivity;Purcell factor |
公開日期: | 1-七月-2018 |
摘要: | Recent developments in small footprint plasmonic nanolasers show promise for active optical sensing with potential applications in various fields, including real-time and label-free biochemical sensing, and gas detection. In this study, we demonstrate a novel hybrid plasmonic crystal nanolaser that features a ZnO nanowire placed on Al grating surfaces with a nanotrench defect nanocavity. The lasing action of gain-assisted defect nanocavity overcomes the ohmic loss parasitically in the plasmonic nanostructures. Therefore, the plasmonic nanolaser exhibits an extremely small mode volume, a narrow linewidth Delta lambda, and a high Purcell factor that can facilitate the strong interaction between light and matter. This can be used as a refractive index sensor and is highly sensitive to local changes in the refractive indices of ambient materials. By careful design, the near-ultraviolet nanolaser sensors have significant sensing performances of glucose solutions, revealing a high sensitivity of 249 nm/RIU and high resolution, with a figure of merit of 1132, at the resonant wavelength of 373 nm. |
URI: | http://dx.doi.org/10.1021/acsphotonics.8b00337 http://hdl.handle.net/11536/147896 |
ISSN: | 2330-4022 |
DOI: | 10.1021/acsphotonics.8b00337 |
期刊: | ACS PHOTONICS |
Volume: | 5 |
起始頁: | 2638 |
結束頁: | 2644 |
顯示於類別: | 期刊論文 |