Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Rm. 415 CPT Building, 1001 Ta-Hsueh Road, Hsinchu 300, Taiwan.
Opt Lett. 2010 May 1;35(9):1452-4. doi: 10.1364/OL.35.001452.
We introduce a photonic crystal hetero-slab-edge microcavity design with surface mode, which is beneficial for optical index sensing. The simulated index sensitivity (R(n)) as high as 675 nm per refractive index unit (nm/RIU) variation is obtained with slab thickness of 180 nm. In experiments, single surface mode lasing action from a real device is observed. Based on the surface mode in this microcavity, high experimental R(n) value of 625 nm/RIU is achieved by detecting index variation in a CO(2) chamber with different gas pressures.
我们提出了一种具有表面模式的光子晶体异质条带边缘微腔设计，有利于光学折射率传感。在 180nm 厚的条带中，模拟的折射率灵敏度（R（n））高达每折射率单位（nm/RIU）变化 675nm。在实验中，观察到来自实际器件的单表面模式激光作用。基于该微腔中的表面模式，通过在具有不同气压的 CO（2）腔室中检测折射率变化，实现了高达 625nm/RIU 的高实验 R（n）值。
