Lab on D-shaped fiber excited via azimuthally polarized vector beam for surface-enhanced Raman spectroscopy

Min Liu; Wending Zhang; Chao Meng; Guanghong Zhang; Lu Zhang; Dong Mao; Ting Mei

doi:10.1364/OE.390024

Lab on D-shaped fiber excited via azimuthally polarized vector beam for surface-enhanced Raman spectroscopy

Min Liu, Wending Zhang, Chao Meng, Guanghong Zhang, Lu Zhang, Dong Mao, Ting Mei

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We present a method for Raman examination using a silver-nanoparticles (Ag-NPs) coated D-shaped fiber (DSF) internally excited via an in-fiber azimuthally polarized beam (APB) generated by an acoustically induced fiber grating. Simulation results show that an electric-field intensity enhancement factor can be effectively improved under APB excitation compared with the linear polarization beam (LPB) excitation, because the strong gap-mode is uniformly generated between two adjacent Ag NPs on the surface of the DSF planar side. Experimental results show that the Raman signal intensity of the methylene blue (MB) detected by DSF in the case of APB excitation is ∼4.5 times as strong as that of LPB excitation, and the Raman detection sensitivity is ∼10⁻⁹ M. The time stability of this method is also tested to be guaranteed.

Original language	English
Pages (from-to)	12071-12079
Number of pages	9
Journal	Optics Express
Volume	28
Issue number	8
DOIs	https://doi.org/10.1364/OE.390024
State	Published - 13 Apr 2020

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title = "Lab on D-shaped fiber excited via azimuthally polarized vector beam for surface-enhanced Raman spectroscopy",

abstract = "We present a method for Raman examination using a silver-nanoparticles (Ag-NPs) coated D-shaped fiber (DSF) internally excited via an in-fiber azimuthally polarized beam (APB) generated by an acoustically induced fiber grating. Simulation results show that an electric-field intensity enhancement factor can be effectively improved under APB excitation compared with the linear polarization beam (LPB) excitation, because the strong gap-mode is uniformly generated between two adjacent Ag NPs on the surface of the DSF planar side. Experimental results show that the Raman signal intensity of the methylene blue (MB) detected by DSF in the case of APB excitation is ∼4.5 times as strong as that of LPB excitation, and the Raman detection sensitivity is ∼10−9 M. The time stability of this method is also tested to be guaranteed.",

author = "Min Liu and Wending Zhang and Chao Meng and Guanghong Zhang and Lu Zhang and Dong Mao and Ting Mei",

note = "Publisher Copyright: {\textcopyright} 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement",

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TY - JOUR

T1 - Lab on D-shaped fiber excited via azimuthally polarized vector beam for surface-enhanced Raman spectroscopy

AU - Liu, Min

AU - Zhang, Wending

AU - Meng, Chao

AU - Zhang, Guanghong

AU - Zhang, Lu

AU - Mao, Dong

AU - Mei, Ting

PY - 2020/4/13

Y1 - 2020/4/13

N2 - We present a method for Raman examination using a silver-nanoparticles (Ag-NPs) coated D-shaped fiber (DSF) internally excited via an in-fiber azimuthally polarized beam (APB) generated by an acoustically induced fiber grating. Simulation results show that an electric-field intensity enhancement factor can be effectively improved under APB excitation compared with the linear polarization beam (LPB) excitation, because the strong gap-mode is uniformly generated between two adjacent Ag NPs on the surface of the DSF planar side. Experimental results show that the Raman signal intensity of the methylene blue (MB) detected by DSF in the case of APB excitation is ∼4.5 times as strong as that of LPB excitation, and the Raman detection sensitivity is ∼10−9 M. The time stability of this method is also tested to be guaranteed.

AB - We present a method for Raman examination using a silver-nanoparticles (Ag-NPs) coated D-shaped fiber (DSF) internally excited via an in-fiber azimuthally polarized beam (APB) generated by an acoustically induced fiber grating. Simulation results show that an electric-field intensity enhancement factor can be effectively improved under APB excitation compared with the linear polarization beam (LPB) excitation, because the strong gap-mode is uniformly generated between two adjacent Ag NPs on the surface of the DSF planar side. Experimental results show that the Raman signal intensity of the methylene blue (MB) detected by DSF in the case of APB excitation is ∼4.5 times as strong as that of LPB excitation, and the Raman detection sensitivity is ∼10−9 M. The time stability of this method is also tested to be guaranteed.

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DO - 10.1364/OE.390024

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JO - Optics Express

JF - Optics Express

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ER -

Lab on D-shaped fiber excited via azimuthally polarized vector beam for surface-enhanced Raman spectroscopy

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