基于侧边抛磨光纤表面等离子体共振的折射率和温度传感研究  

Refractive Index and Temperature Sensing Based on Surface Plasmon Resonance Fabricated on a Side-Polished Fiber

作　　者：陈小龙[1] 罗云瀚[1] 徐梦云[1] 张怡龙 何永红[2] 唐洁媛[1] 余健辉[1] 张军[1] 陈哲[1] 

机构地区：[1]暨南大学光电信息与传感技术广东普通高校重点实验室,广东广州510632 [2]清华大学深圳研究生院光学检测与成像实验室,广东深圳518055

出　　处：《光学学报》2014年第2期60-65,共6页Acta Optica Sinica

基　　金：国家自然科学基金(61177075;11004086;61008057);中央高校基本科研业务费(21612437;21613405;21613325);广东省战略性新兴产业核心技术攻关项目(2012A032300016);广东高校优秀青年创新人才培养计划(LYM10024)

摘　　要：用轮式侧边抛磨法制作侧边抛磨光纤,通过磁控溅射法溅射金膜制成侧边抛磨光纤表面等离子体共振(SPR)传感器,并通过理论和实验对传感器的折射率灵敏度以及温度特性做了深入研究。结果表明表面等离子体共振波长随待测样品折射率的增大向长波长方向漂移,平均折射率灵敏度为4.1×103 nm/RIU(RIU为单位折射率),高于已报道的结果;共振波长随待测样品温度的升高向短波长方向漂移,平均温度灵敏度为0.36nm/℃,故该光纤SPR传感器具有更强抗温度漂移能力和更高的高折射率灵敏度,其在生物化学传感领域有重要的应用。A surface plasmon resonance （SPR） sensor based on side-polished fiber is fabricated by coating a thin gold film on the polished zone. The characteristics of the sensor for ambient refractive index and temperature are tested. The results show that the resonance dip shifts to longer wavelength as the ambient refractive index is increased and shifts to shorter wavelength as the temperature is increased. The average sensitivity of resonance wavelength to variation in refractive index is 4.1×10a nm/RIU （RIU is the unit of refractive index）. Moreover, a linear sensitivity of resonance wavelength to variation in temperature reaches 0.36 nm/℃ The fiber optical SPR sensor, possessing stronger resistance to temperature drift and higher refractive index sensitivity, can play an important role in biochemical sensing.

关 键 词：传感器 表面等离子体共振 侧边抛磨光纤 折射率 温度 

分 类 号：O433[机械工程—光学工程]