8 March 2014 Refractive index sensing utilizing photonic crystal nano-beam cavity with slotted stack
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Abstract
Two types of optical sensor based on one-dimensional Photonic Crystal (PhC) stack nanobeam cavity has been designed, fabricated and characterized. One-dimensional PhC stack nanobeam cavity with measured Q-factors up to 27000 and a sensitivity of 270nm/RIU has been demonstrated. Then, we introduce a finite width slot between two periodic arrays of the dielectric stacks. Thus, the majority of optical field distributes in the slotted low-index area and the light matter interaction with the analytes has been enhanced. A sensitivity of 410nm/RIU has been achieved while maintaining the Q-factors near 104.
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Peipeng Xu, Peipeng Xu, Kaiyuan Yao, Kaiyuan Yao, Jiajiu Zheng, Jiajiu Zheng, Xiaowei Guan, Xiaowei Guan, Yaocheng Shi, Yaocheng Shi, } "Refractive index sensing utilizing photonic crystal nano-beam cavity with slotted stack", Proc. SPIE 8988, Integrated Optics: Devices, Materials, and Technologies XVIII, 89881C (8 March 2014); doi: 10.1117/12.2042457; https://doi.org/10.1117/12.2042457
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