摘要
微流控光学检测系统的微型化和集成化是微流控技术的发展趋势,微量液体物质的旋光检测也是微流控光学技术的重要研究课题之一。分析了内含磁致旋光介质的旋光反射腔的偏光特性,理论预言这种旋光反射腔具有旋光增强效应,在此基础上提出了微量样品的旋光增强检测方法和器件设计原理。研究结果表明,该方法可以在小光程限制条件下显著提高磁旋光介质的检测灵敏度。在不考虑样品吸收的情况下,旋光增强法与普通消光法的检测灵敏度之比的极限约为78.5。该方法可以应用于微流控系统的旋光检测以及实现磁旋光仪器的小型化和微型化。
One of the developing trend of microfluidic technology is the integration and miniaturization of the optical detection system. In the meantime, the polarimetric detection of microfluidic system is also one of the important research topics. In this work, the polarized characteristics of polarimetric reflection cavity embedded with Faraday magneto-optic medium is analyzed in detail. It is predicted that such a rotatory reflection cavity has the effect of megneto-optic rotation enhancement. Base on this phenomenon, the method for the angle detection of small amount sample and the theory for the feature analysis of Faraday rotation devices are proposed. The results show that the method can significantly improve the detection sensitivity of magneto-optic rotation media under conditions where the optical path is sieriously restricted. The theoretical limitation of the relative sensitivity with polarimetric detection is 78.5. The method can be applied to the megneto-optical rotation detection of microfluidic system and miniaturize the megneto-optic polarimetric instruments.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第8期2221-2224,共4页
Acta Optica Sinica
基金
国家自然科学基金(60878037)
南京邮电大学攀登计划(206076
207030)资助课题
关键词
微流控光学技术
法拉第旋光效应
磁旋光增强
微小旋光角检测
optofluidic technology
Faraday effect
magneto-optical rotation enhancement
detection of small rotation angle
