Title

Comparison of Silica and Sapphire Fiber SERS Probes Fabricated by a Femtosecond Laser

Abstract

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.

Department(s)

Electrical and Computer Engineering

Second Department

Mechanical and Aerospace Engineering

Sponsor(s)

National Energy Technology Laboratory (U.S.)

Comments

This work was supported by the Department of Energy–National Energy Technology Laboratory under Contract DE-FE0001127.

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)

1041-1135; 1941-0174

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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