Slot结构聚合物波导微环光学生物传感器研究  

Study on Polymer Microring Optical Biosensor Based on Slot Waveguide

作　　者：韩笑男 韩秀友[1] 邵宇辰 陆志理 滕婕[2] 武震林 王锦艳[3] 赵明山[1] 

机构地区：[1]大连理工大学物理与光电工程学院,辽宁大连116024 [2]中国电子科技集团第三十八研究所,安徽合肥230088 [3]大连理工大学化工学院,辽宁大连116024

出　　处：《光学学报》2016年第4期188-195,共8页Acta Optica Sinica

基　　金：科技部国际合作项目(2014DFG32590);国家自然科学基金(60807015;61077015;61307040);国家863计划(2012AA040406);辽宁省自然科学基金(2014020002);中央高校基本科研业务费专项(DUT13JB01;DUT15TD47)

摘　　要：Slot结构在提高集成波导光学传感器灵敏度和降低探测极限值方面具有极大的优势。对基于Slot结构的聚合物PSQ-Ls波导微环光学生物传感器进行了研究。分析了850 nm波段Slot波导的单波导高度、狭缝宽度及单波导宽度对传感器灵敏度的影响,在满足单模传输的条件下,得到了优化的微环传感器横截面尺寸参数。对Slot结构波导微环的弯曲损耗、自由光谱范围等进行了仿真分析,得到微环传感器的消光比、品质因子等随结构参数的变化,确定了优化的微环弯曲半径、耦合效率。与正脊形结构波导微环传感器相比,Slot结构波导微环传感器的灵敏度是前者的两倍,探测极限值是其一半。The Slot structure is superior in improving the sensitivity of integrated optical waveguide sensor and decreasing the detection limit. The microring optical biosensor based on PSQ-Ls polymer waveguide with the slot structure is studied. The influence of height, width and slot width of the Slot waveguide on the sensitivity is analyzed at the 850 nm band, and the optimized cross section parameters of microring sensor are gained for the single mode transmission. The bend loss and free spectral range of the Slot waveguide microring are analyzed, and the relationship between structural parameters and performance of microring sensor, such as extinction ratio, quality factor, is obtained. The optimized bend radius and coupling efficiency of the microring are achieved. Compared to the ridge waveguide based microring sensor, the Slot waveguide based microring sensor has twice of the sensitivity and a half of the detection limit.

关 键 词：集成光学 Slot波导 波导微环 光学生物传感器 探测极限 

分 类 号：O436[机械工程—光学工程]