光学学报, 2011, 31 (s1): s100210, 网络出版: 2011-06-23
基于液芯谐振器的传感器的研制与性能检测
Fabrication and Characteristics of Sensors Based on Liquid-Core Resonators
传感器 液芯环形谐振器 腐蚀和热拉伸 回音壁模式 灵敏度 sensors liquid core optical ring resonators outer etching and heat stretch whispering gallery modes sensitivity
摘要
生物传感器在环境监测、食品分析、**和医学等领域有着广泛的应用,其中光纤生物传感器由于高灵敏度和低噪声的特点而最受关注。作为光纤生物传感器的一种,液芯光学环形谐振传感器(LCORR)物理尺寸小,Q值高(理论可达109),很有希望成为未来敏感化、小型化和集成化传感器的平台。在理论和实验上对该种器件进行了详尽的研究, 尤其改良了制备工艺,将外腐蚀与加热拉伸工艺交替结合, 精确调控拉伸速率,制备了壁厚超薄(1.5 μm)的微细玻璃管;采用微纳光纤耦合的方法,通过向其中注入纯水、丙酮和不同浓度的NaCl溶液来对其Q值、灵敏度等性质进行了检测。最终制得的液芯环形谐振器灵敏度高达约61.5 nm/RIU,并具有较好的稳定性。
Abstract
Biosensors are widely used in many fields, such as environmental detection, food analysis, military and medicine. Because of their high sensitivity and low noise, optical biosensors attract the most attention. As one kind of optical biosensors, liquid core optical ring resonator (LCORR) is small in size and has high Q-factor (up to 109), which has the potential to become a promising technology platform for future sensitive, miniaturized and lab-on-a-chip type sensors. The devices are investigated theoretically and experimentally in details. Ultra-thin micro-capillaries are fabricated by an improved technique which combines the outer etching and the stretching of the heated LCORR to accurately control the stretching velocity. The Q-factor and the sensitivity of LCORR are tested by injecting pure water, acetone, or NaCl solution of different concentrations into them. The LCORR show high sensitivity of about 61.5 nm/RIU and have great stability.
刘昕宇, 洪图, 吴子建, 刘奇, 徐飞, 陆延青. 基于液芯谐振器的传感器的研制与性能检测[J]. 光学学报, 2011, 31(s1): s100210. Liu Xinyu, Hong Tu, Wu Zijian, Liu Qi, Xu Fei, Lu Yanqing. Fabrication and Characteristics of Sensors Based on Liquid-Core Resonators[J]. Acta Optica Sinica, 2011, 31(s1): s100210.