High-Q width modulated photonic crystal stack mode-gap cavity and its application to refractive index sensing
High-Q width modulated photonic crystal stack mode-gap cavity and its application to refractive index sensing
复制标题
高Q宽度调制光子晶体叠层模隙腔及其在折射率传感中的应用
DOI：
10.1364/oe.20.027039
复制
发表时间：
2012-11-19
期刊：
影响因子：
3.8
通讯作者：
Shi, Yaocheng
中科院分区：
文献类型：
--
作者：
Yao, Kaiyuan;Shi, Yaocheng
设计、制作了一种基于一维光子晶体（1D PhC）叠模隙腔的光学传感器，并对其进行了表征。通过引入二次调制宽度变细结构，设计出q因子为1.74 × 10(7)、有效模体积为1.48（λ /n(Si)）的波导耦合一维PhC堆叠模隙腔。该空腔通过浸入不同体积浓度的水-乙醇混合物中用于传感应用。透射率测量表明，浸没在分析物中的空腔的质量系数可高达27000。灵敏度为269nm/RIU。(C) 2012美国光学学会
An optical sensor based on One-Dimensional photonic crystal (1D PhC) stack mode-gap cavity has been designed, fabricated and characterized. By introducing quadratically modulated width tapering structure, a waveguide coupled 1D PhC stack mode-gap cavity with calculated Q-factor 1.74 x 10(7) and an effective mode volume 1.48(lambda/n(Si))(3) has been designed. This cavity has been used for sensing applications by immersing into water-ethanol mixture of different volume concentrations. Transmission measurement shows a quality factor as high as 27, 000 can be achieved for the cavity immersed in analytes. A sensitivity of 269nm/RIU has been demonstrated. (C) 2012 Optical Society of America