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.