A Simplified Hollow-Core Photonic Crystal Fiber SERS Probe with a Fully Filled Photoreduction Silver Nanoprism

Youfu Geng; Yiwen Xu; Xiaoling Tan; Lina Wang; Xuejin Li; Yu Du; Xueming Hong

doi:10.3390/s18061726

A Simplified Hollow-Core Photonic Crystal Fiber SERS Probe with a Fully Filled Photoreduction Silver Nanoprism

Sensors (Basel). 2018 May 28;18(6):1726. doi: 10.3390/s18061726.

Authors

Youfu Geng¹, Yiwen Xu², Xiaoling Tan³, Lina Wang⁴, Xuejin Li^{5

6}, Yu Du⁷, Xueming Hong⁸

Affiliations

¹ Collage of Physics and Energy, Shenzhen Key Lab. of Sensor Technol., Shenzhen University, Shenzhen 518060, China. gengyf@szu.edu.cn.
² Collage of Physics and Energy, Shenzhen Key Lab. of Sensor Technol., Shenzhen University, Shenzhen 518060, China. YiwenXu_szu@163.com.
³ The Electronic Communication Department, Shenzhen Institute of Information Technology, Shenzhen 518172, China. tanxl@sziit.edu.cn.
⁴ Collage of Physics and Energy, Shenzhen Key Lab. of Sensor Technol., Shenzhen University, Shenzhen 518060, China. wanglina2017@email.szu.edu.cn.
⁵ Collage of Physics and Energy, Shenzhen Key Lab. of Sensor Technol., Shenzhen University, Shenzhen 518060, China. lixuejin@szu.edu.cn.
⁶ School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China. lixuejin@szu.edu.cn.
⁷ Collage of Physics and Energy, Shenzhen Key Lab. of Sensor Technol., Shenzhen University, Shenzhen 518060, China. duyu@szu.edu.cn.
⁸ Collage of Physics and Energy, Shenzhen Key Lab. of Sensor Technol., Shenzhen University, Shenzhen 518060, China. xmhong@szu.edu.cn.

Abstract

In this paper, a simplified hollow-core photonic crystal fiber surface-enhanced Raman scattering (SERS) probe is presented. Silver nanoprisms are grown with a photoreduction method and account for the SERS, which have better electromagnetic enhancement than spherical silver nanoparticles at 785 nm. Due to the antiresonant reflecting guidance mechanism, the excited laser and SERS signal are effectively guided in such a fully filled hollow-core photonic crystal fiber SERS probe and complicated selective filling with target sample is avoided. Rhodamine 6G molecules are used as probe molecules and the simplified hollow-core photonic crystal fiber SERS probe is test. Detection of low concentration Rhodamine 6G down to 10^-8 M is achieved with a short integration time of 300 ms.

Keywords: Mach-Zehnder interferometer; high sensitivity; micro-nano fiber; optical fiber sensor; refractive index measurement.