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Simple and Low‐Cost Plasmonic Fiber‐Optic Probe as SERS and Biosensing Platform
Author(s) -
Liu Yun,
Guang Jianye,
Liu Chuan,
Bi Sheng,
Liu Qiang,
Li Ping,
Zhang Ning,
Chen Shimeng,
Yuan Huizhen,
Zhou Dapeng,
Peng Wei
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900337
Subject(s) - materials science , plasmon , nanotechnology , biosensor , nanophotonics , optical fiber , fabrication , surface enhanced raman spectroscopy , fiber , raman spectroscopy , optoelectronics , raman scattering , computer science , optics , telecommunications , medicine , alternative medicine , physics , pathology , composite material
As an emerging and promising paradigm of nanophotonic “lab‐on‐a‐chip” devices, plasmonic fiber‐optic (FO) probes with nanopatterns suffer from high cost and a complex fabrication process, which keep them from becoming the preferred choice for most optical fiber sensing applications. In this paper, a nanopatterned FO probe is demonstrated to be a surface‐enhanced Raman spectroscopy substrate and a plasmonic biosensor through theoretical simulations and experiments. The probe is assembled with imprinted nanocavities on the tip of the optical fiber and fabricated through a low‐cost and facile method. The FO probe overcomes the shortcomings of conventional optical fiber sensors that have nanoscale patterns and structures, such as requiring a complex and time‐consuming procedure, expensive specialized instruments, and experienced professional operation. Through investigating its surface sensitivity and the plasmonic coupling effect between Au nanoparticles and the nanocavity, this probe is found to have practical applications in the detection of biochemical molecules. The proposed FO probe can be produced under common experimental conditions, and its operation is simple and understandable, which serves as a new strategy for fabricating nanostructures on fiber tips.