激光与光电子学进展, 2011, 48 (1): 012401, 网络出版: 2010-12-13
基于金纳米层的微结构光纤表面等离子体共振传感器
Surface Plasmon Resonance Sensors Based on Au-Metalized Nanolayer in Microstructured Optical Fibers
光纤光学 微结构光纤 表面等离子体共振 传感器 金纳米层 fiber optics microstructure optical fiber surface plasmon resonance sensor Au nanolayer
摘要
采用有限元法分析了基于金纳米层的新型微结构光纤表面等离子体共振传感器的相关特性。在数值仿真中,使用精确的德鲁德洛伦兹(Drude-Lorentz)模型来描述金属介电常数。计算结果表明,随待测样品折射率的增加,表面等离子体共振峰波长向长波长方向漂移。该微结构光纤表面等离子体共振传感器的探测灵敏度可达1200 nm/RIU(refractive index unit),探测极限可达8.33×10-5RIU。
Abstract
Surface plasmon resonance sensors based on Au-metalized nanolayer in microstructured optical fibers are theoretically analyzed by using finite element method. In simulations, the accurate Drude-Lorentz model is used to describe the metal dielectric constant. The numerical results show that as the refractive index of the liquid increases, the surface plasmon resonance peak shifts to longer wavelength. The sensitivity of Au-metalized surface plasmon resonance sensor can reach 1200 nm/RIU (refractive index unit) and the corresponding resolution is 8.33×10-5 RIU.
郑龙, 张霞, 施雷, 高静, 马会芳, 黄永清, 任晓敏. 基于金纳米层的微结构光纤表面等离子体共振传感器[J]. 激光与光电子学进展, 2011, 48(1): 012401. Zheng Long, Zhang Xia, Shi Lei, Gao Jing, Ma Huifang, Huang Yongqing, Ren Xiaomin. Surface Plasmon Resonance Sensors Based on Au-Metalized Nanolayer in Microstructured Optical Fibers[J]. Laser & Optoelectronics Progress, 2011, 48(1): 012401.