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-Jul-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
Appears in Collections:Articles