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利用时域有限差分(FDTD)程序计算了二维砷化镓石墨点阵柱状光子晶体的能带。结果表明,这种二维石墨点阵柱状光子晶体在0.53~0.58的归一化频率区间有一个完全光子带隙。基于此,构造了一种二维砷化镓石墨点阵柱状光子晶体应力传感器的模型,利用FDTD方法,计算了传感器共振腔TEy模的共振峰波长沿x轴方向和y轴方向应力变化的情况,以及共振峰波长随应力环境变化的情况。计算结果表明,传感器共振峰波长随应力环境变化具有很好的线性特性,其应力响应灵敏度为0.0111 nm/MPa;这种石墨点阵柱状光子晶体传感器沿x轴方向和y轴方向的应力响应灵敏度相同。
The energy band of a two-dimensional graphite gallium arsenide lattice columnar photonic crystal was calculated by FDTD. The results show that the two-dimensional graphite lattice columnar photonic crystal has a perfect photonic band gap in the normalized frequency range from 0.53 to 0.58. Based on this, a two-dimensional model of gallium arsenide graphite dot matrix columnar photonic crystal stress sensor is constructed. By using the FDTD method, the stress variation along the x-axis and y-axis of the resonant cavity TEy mode is calculated , As well as the resonance peak wavelength with the stress environment changes. The calculated results show that the resonant wavelength of the sensor has good linearity with the change of stress environment and the stress response sensitivity is 0.0111 nm / MPa. The stress response sensitivity along the x-axis and y-axis of this graphite lattice cylindrical photonic crystal sensor the same.