Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 35, Issue 16, Pages 3323-3333Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2016.2590879
Keywords
Biochemical sensing; electrochemical sensing; grating; optical fiber; photonics; plasmonics
Funding
- Guangdong Youth Science and Technology Innovation Talents of China [2014TQ01X539]
- Guangdong Natural Science Foundation of China [2014A030313387]
- Guangdong Innovation Foundation of China [2015KTSCX016]
- Guangzhou Key Collaborative Innovation Foundation of China [2016201604030084]
- Fundamental Research Funds for the Central Universities of China [21615446]
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Surface plasmon resonance (SPR) optical fiber sensors can be used as a cost-effective and relatively simple-to-implement alternative to well established bulky prism configurations for in situ high sensitivity biochemical and electrochemical measurements. The miniaturized size and remote operation ability offer them a multitude of opportunities for single-point sensing in hard-to-reach spaces, even possibly in vivo. Grating-assisted and polarization control are two key properties of fiber-optic SPR sensors to achieve unprecedented sensitivities and limits of detection. The biosensor configuration presented here utilizes a nanoscale metal-coated tilted fiber Bragg grating (TFBG) imprinted in a commercial single-mode fiber core with no structural modifications. Such sensor provides an additional resonant mechanism of high-density narrow cladding mode spectral combs that overlap with the broader absorption of the surface plasmon for high accuracy interrogation. In this paper, we briefly review the principle, characterization and implementation of plasmonic TFBG sensors, followed by our recent developments of the surface and localized affinity studies of the biomolecules for real life problems and the electrochemical actives of electroactive biofilms for clean energy resources.
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