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Title: High-performance plasmonic nanolasers with a nanotrench defect cavity for sensing applications
Authors: P.-J. Cheng
Z.-T. Huang
J.-H. Li
B.-T. Chou
Y.-H. Chou
W.-C. Lo
K.-P. Chen
T.-R. Lin
T.-C. Lu
Contributors: 國立臺灣海洋大學:光電科學研究所
Keywords: surface plasmon resonance
optical sensors
Purcell factor
Date: 2018-06
Issue Date: 2018-07-24T01:12:25Z
Publisher: ACS Photonics
Abstract: Abstract: 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 Δλ, 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.
Relation: 5(7) pp.2638–2644
Appears in Collections:[Institute of Optoelectronic Sciences] Periodical Articles

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