Chen Ying, Zhao Zhiyong, Tian Yaning, Liu Xiaofei, Zhu Qiguang, Zhai Yingjian, Li Shaohua. Refractive Index Sensing Mechanism of Waveguide Coupled Gratings Nano-Heterostructure Containing Porous Silicon Layers[J]. Chinese Journal of Lasers, 2017, 44(10): 1010003
- Chinese Journal of Lasers
- Vol. 44, Issue 10, 1010003 (2017)
Fig. 1. Schematic of refractive index sensing model of waveguide coupled grating containing porous silicon
Fig. 2. Diagram of optical path in waveguide coupled grating
Fig. 3. Diagram of Goos-Hänchen displacement
Fig. 4. Reflectance spectrum of waveguide coupled grating sensing structure
Fig. 5. Resonant wavelength shift of sensing units with different refractive indexes
Fig. 6. Resonant wavelength shift of HOCH2CH2OH solutions with different concentrations
Fig. 7. Linear fitting relationship between HOCH2CH2OH solution concentration and resonant wavelength
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