Tip-Enhanced Raman Spectroscopy with High-Order Fiber Vector Beam Excitation

Fanfan Lu; Tengxiang Huang; Lei Han; Haisheng Su; Heng Wang; Min Liu; Wending Zhang; Xiang Wang; Ting Mei

doi:10.3390/s18113841

Sensors (Nov 2018)

Tip-Enhanced Raman Spectroscopy with High-Order Fiber Vector Beam Excitation

Fanfan Lu,
Tengxiang Huang,
Lei Han,
Haisheng Su,
Heng Wang,
Min Liu,
Wending Zhang,
Xiang Wang,
Ting Mei

Affiliations

Fanfan Lu: MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
Tengxiang Huang: State Key Laboratory of Physical Chemistry of Solid surface, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
Lei Han: MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
Haisheng Su: State Key Laboratory of Physical Chemistry of Solid surface, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
Heng Wang: MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
Min Liu: MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
Wending Zhang: MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
Xiang Wang: State Key Laboratory of Physical Chemistry of Solid surface, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
Ting Mei: MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China

DOI: https://doi.org/10.3390/s18113841
Journal volume & issue: Vol. 18, no. 11
p. 3841

Abstract

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We investigated tip-enhanced Raman spectra excited by high-order fiber vector beams. Theoretical analysis shows that the high-order fiber vector beams have stronger longitudinal electric field components than linearly polarized light under tight focusing conditions. By introducing the high-order fiber vector beams and the linearly polarized beam from a fiber vector beam generator based on an electrically-controlled acoustically-induced fiber grating into a top-illumination tip-enhanced Raman spectroscopy (TERS) setup, the tip-enhanced Raman signal produced by the high-order fiber vector beams was 1.6 times as strong as that produced by the linearly polarized light. This result suggests a new type of efficient excitation light beams for TERS.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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