Yun-Tuan Fang, Yu-Ya Wang, Jing Xia. Large-range electric field sensor based on parity-time symmetry cavity structure [J]. Acta Physica Sinica, 2019, 68(19): 194201-1
- Acta Physica Sinica
- Vol. 68, Issue 19, 194201-1 (2019)
Fig. 1. Schematic of designed structure.结构示意图
Fig. 2. The real part and imaginary part of layers A and C, respectively.A, C层的介电常数的实部和虚部随波长的分布
Fig. 3. Transmission spectra with different d B.
不同d B下的结构透射率谱线
Fig. 4. The positions of defect modes with different d B.
不同d B下的缺陷模式的峰值位置变化
Fig. 5. The transmission spectra of the structure with different period number: (a) N = 5; (b) N = 6; (c) N = 7.
周期数不同时的结构透射谱 (a) N = 5; (b) N = 6; (c) N = 7
Fig. 6. The transmission spectra of the structure with two values of
.
两种
的取值得到的传输谱
Fig. 7. The field distributions inside the structure with N = 6: (a) Calculation based on the transfer matrix method; (b) frequency domain simulation based on Comsol.
两种方法研究结构周期数N = 6时缺陷模在结构内部对应的场分布 (a) 传输矩阵方法; (b) comsol软件频域仿真
Fig. 8. The refraction index of LiNbO3 with the electric field.
LiNbO3的折射率与电场的关系
Fig. 9. The transmission spectra of the structure with different ecetric fields.不同电场条件下结构共振腔的透射谱
Fig. 10. (a) The peak value of defect mode versus the electric field; (b) the sensor sensitivity.(a)缺陷模峰值大小与电场的变化关系; (b)传感灵敏度
Fig. 11. (a) The wavelength of defect mode versus the electric field; (b) the sensor sensitivity.(a)缺陷模波长与电场的变化关系; (b)灵敏度分布
Fig. 12. The determination of resolution. The interval of two peaks is just equal to the half-angular breadth.传感器分辨率的确定, 图中标注峰值间隔等于峰的半角宽度
Fig. 13. The peak values of defect mode versus the electric fields with different
.
不同
取值下, 结构的透射谱峰值随电场的变化曲线
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