期刊
OPTICS LETTERS
卷 42, 期 21, 页码 4395-4398出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.42.004395
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资金
- Deutsche Forschungsgemeinschaft (DFG) [SCHM2655/3-1]
- International Research Training Group (IRTG) [2101]
- Thuringian State [2015-0021, 2015FGI0011]
- ARC Centre of Excellence for Nanoscale Biophotonics [CE14010003]
- Commonwealth and South Australian State Government
Here, we show that immobilizing ensembles of gold nanospheres within tailored areas on the open side of an exposed-core microstructured fiber yields a monolithic, highly sensitive plasmon-based refractive index sensor. The nanoparticle densities (average nanoparticle diameter: 45 nm) on the small-core fiber (core diameter: 2.5 mu m) are controlled electrostatically, yielding densities of 4 nanoparticles/mu m(2). Refractive index sensitivities of 200 nm/RIU for aqueous analytes at high fringe contrast levels (-20 dB) have been observed. Our concept presents an easy-to-use, efficient, and multiplex-compatible sensing platform for rapid small-volume detection with the capacity for integration into a bioanalytic, optofluidic, or microfluidic system. (C) 2017 Optical Society of America
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