Novel D-type fiber optic localized plasmon resonance sensor realized by femtosecond laser engraving

Chien Hsing Chen, Tzu Chien Chao, Wan Yun Li, Wei Chih Shen, Chung-Wei Cheng, Jaw Luen Tang, Lai Kwan Chau*, Wei Te Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

A novel fiber optic localized plasmon resonance (FO-LPR) sensor composed of a D-shape opti-cal fiber was proposed and demonstrated in the present study. The D-shape optical fiber was fabri-cated by a femtosecond laser micromachining system. The dimensions of the D-shape zone were 100 μm in depth measured from the surface of the polymer jacket layer, and the total length was 6 mm. After annealing treatment, the mean roughness of the surface was 231.7 nm as determined by AFM. The exposed surface of the D-shape fiber was modified with self-assembled gold nanoparti-cles to produce the FO-LPR sensor. The response of the sensor shows that the signal increases line-arly with increasing refractive index. The sensor resolution of the sensor was determined to be 4.1×10-4 RIU.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalJournal of Laser Micro Nanoengineering
Volume5
Issue number1
DOIs
StatePublished - 1 Feb 2010

Keywords

  • D-shape optical fiber
  • Femtosecond laser
  • Fiber optic localized plasmon resonance

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