Comparison of Silica and Sapphire Fiber SERS Probes Fabricated by a Femtosecond Laser
Different types of fibers were compared for construction of reflection-based surface-enhanced Raman-scattering (SERS) fiber probes. The probes were made by direct femtosecond (fs) laser micromachining of nanometer structures on the fiber endface and subsequent chemical plating of a thin layer of silver. Rhodamine 6G solutions were used to evaluate the performance of the SERS probes. In comparison with the silica fibers, the single-crystal sapphire fiber has much lower background Raman scattering. The fs laser is found effective to fabricate high-quality sapphire fiber SERS probes for detection of weak Raman signals in a reflection configuration.
L. Yuan et al., "Comparison of Silica and Sapphire Fiber SERS Probes Fabricated by a Femtosecond Laser," IEEE Photonics Technology Letters, vol. 26, no. 13, pp. 1299-1302, Institute of Electrical and Electronics Engineers (IEEE), Jul 2014.
The definitive version is available at http://dx.doi.org/10.1109/LPT.2014.2321505
Electrical and Computer Engineering
Mechanical and Aerospace Engineering
National Energy Technology Laboratory (U.S.)
Keywords and Phrases
Fiber optic sensors; Probes; Raman scattering; Raman spectroscopy; Sapphire; Silica; Single crystals; Surface scattering; Ultrafast lasers; Ultrashort pulses, Chemical plating; Femtosecond (fs) laser; Nanometer structure; Reflection configuration; Sapphire fiber; Silica fibers; Single crystal sapphire fibers; Surface enhanced Raman Scattering (SERS); Fibers; Femtosecond laser; Single-crystal sapphirefiber
International Standard Serial Number (ISSN)
Article - Journal
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