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Proceedings Paper

A biconical taper multi-mode fiber SERS sensor
Author(s): Hua Bai; Zhenyi Chen; Na Chen; Qiang Guo; Kun Zhang; Fufei Pang; Tingyun Wang
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Paper Abstract

A surface-enhanced Raman scattering (SERS) optical fiber sensor using biconical taper multi-mode fiber (MMF) is proposed. It is fabricated by fused elongating a multi-mode fiber and then coated the silver colloid on its waist. The main advantage of this sensor is that it can increase the SERS active substrate region to make more molecules be excited to produce Raman signal. Silver colloid is selected as the active substrate of SERS. A modified immobilizing process is introduced to increase the thickness of the immobilized layer and reduce the preparation time. Various concentration of R6G is used to detect the performance of the sensor. Strong Raman signal is detected from the waist of the tapered fiber. The detection sensitivity is up to 10-9M.

Paper Details

Date Published: 3 January 2011
PDF: 6 pages
Proc. SPIE 7990, Optical Sensors and Biophotonics II, 799004 (3 January 2011); doi: 10.1117/12.888564
Show Author Affiliations
Hua Bai, Shanghai Univ. (China)
Zhenyi Chen, Shanghai Univ. (China)
Na Chen, Shanghai Univ. (China)
Qiang Guo, Shanghai Univ. (China)
Kun Zhang, Shanghai Univ. (China)
Fufei Pang, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 7990:
Optical Sensors and Biophotonics II
Qingming Luo; Frank Chuang; Stefan Haacke; Chih-Chung Yang, Editor(s)

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