De-Xian Yan, Jiu-Sheng Li, Yi Wang. High sensitivity terahertz refractive index sensor based on sunflower-shaped circular photonic crystal [J]. Acta Physica Sinica, 2019, 68(20): 207801-1
- Acta Physica Sinica
- Vol. 68, Issue 20, 207801-1 (2019)
Fig. 1. (a) 2D structure of the terahertz wave sensor based on the circular photonic crystal; (b) 3D structure of the sensor.圆形光子晶体太赫兹波传感器 (a)二维结构; (b)三维结构
Fig. 2. Calculated transmission spectra of a circular photonic crystal without defects (dashed blue curve) and the designed sensor (solid red curve).计算得到的无缺陷圆形光子晶体的透射光谱(蓝色虚线)和基于圆形光子晶体设计的太赫兹传感器的透射光谱(红色实线)
Fig. 3. Transmission spectra of the circular photonic crystal sensor ranging from 0.5 to 2.0 THz with different refractive indices of the samples.不同样品折射率时圆形光子晶体传感器在0.5— 2.0 THz范围内的透射谱
Fig. 4. Transmission spectra of the circular photonic crystal sensor around the selected resonant frequency of 1.233 THz with different refractive indices of the samples.圆形光子晶体传感器共振频率1.233 THz附近的透射光谱
Fig. 5. Influence of t on sensitivity S , Q -factor and FOM when g = 0 μm.
当g = 0 μm参数t 对灵敏度S , Q 因子和FOM的影响
Fig. 6. Influence of g on sensitivity S , Q -factor and FOM when t = 0 μm.
当t = 0 μm时参数g 对灵敏度S , Q 因子和FOM的影响
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