Multi-hole fiber based surface plasmon resonance sensor operated at near-infrared wavelengths

作者：Gao, Di; Guan, Chunying^*; Wen, Yaowu; Zhong, Xing; Yuan, Libo

来源：Optics Communications, 2014, 313: 94-98.

DOI：10.1016/j.optcom.2013.10.015

• Surface plasmon resonance
• Multi-hole fiber
• Micro structured fiber
• Refractive-index sensor

We propose a surface plasmon resonance (SPR) sensor based on a single mode optical fiber with six air holes. A thin gold film and a TiO2 film aiare deposited on the walls of an holes. Due to high refractive index of TiO2 the proposed sensor can operate at near-infrared (FR) wavelengths. The characteristics of the sensor were numerically investigated based on the finite-element method (FEM). The numerical results indicate that the optical loss spectrum of SPR sensor can be tuned easily by changing the thicknesses of gold and TiO2 layers. The refractive-index resolution of 2.7 x 10(-5) (sensitivity S approximate to 370/RIU) for aqueous analytes can be achieved.

• 出版日期2014-2-15
• 单位哈尔滨工程大学