Simple and Low‐Cost Plasmonic Fiber‐Optic Probe as SERS and Biosensing Platform. Issue 19 (1st July 2019)

• Record Type: Journal Article
• Authors: Liu, Yun; Guang, Jianye; Liu, Chuan; Bi, Sheng; Liu, Qiang; Li, Ping; Zhang, Ning; Chen, Shimeng; Yuan, Huizhen; Zhou, Dapeng; Peng, Wei
• Is Part Of: Advanced optical materials. Volume 7:Issue 19(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-07-01
• Subjects: biosensing -- low cost -- nanofabrication -- optical fiber -- plasmonics -- surface‐enhanced Raman spectroscopy; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201900337
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: 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. Abstract : A nanopatterned fiber‐optic probe is demonstrated to be a surface‐enhanced Raman spectroscopy substrate and a plasmonic biosensor through theoretical simulations and experiments. The proposed 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.