Ying Chen, Xinbei Gao, Yangmei Xu, Jinggang Cao, Jinchao Xie, Qiguang Zhu, Shaohua Li. Fano Resonance-Sensing Mechanism of Photonic Crystal Nanobeam Side-Coupling Aperture Chirped Photonic Crystal Nanobeam Cavity Structure[J]. Acta Optica Sinica, 2019, 39(11): 1123002
- Acta Optica Sinica
- Vol. 39, Issue 11, 1123002 (2019)
Fig. 1. Structural diagram of PCN side-coupling aperture chirped PCNC
Fig. 2. Diagrams of structure and simplified model. (a) Diagram of Fano resonance structure; (b) simplified diagram of theoretical model
Fig. 3. Diagrams of Fano resonance line and field distribution. (a) Fano resonance line; (b) electromagnetic field distribution at the trough; (c) electromagnetic field distribution at the peak
Fig. 4. F OM values corresponding to Fano resonances at different wavelengths
Fig. 5. Effect of r on sensor performance. (a) Effect of r on Fano resonance; (b) effect of r on F OM value; (c) effect of r on sensitivity
Fig. 6. Effect of a on sensor performance. (a) Effect of a on Fano resonance; (b) effect of a on F OM value; (c) effect of a on sensitivity
Fig. 7. Effect of g on sensor performance. (a) Effect of g on Fano resonance; (b) effect of g on F OM value; (c) effect of g on sensitivity
Fig. 8. Comparison of F OM values of three structures
Fig. 9. Influence of refractive index n on sensing characteristics. (a) Influence of refractive index n on Fano resonance peak; (b) fitting curve of relationship between refractive index n and resonant wavelength
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