一种光子晶体谐振腔的TM模特性

构造了一种二维砷化镓石墨点阵柱状光子晶体谐振腔.利用时域有限差分方法计算了这种光子晶体谐振腔TM_y模的共振峰波长随应力和温度变化的情况.计算结果表明,这种谐振腔TM_y模的共振峰波长随x、y方向的应力变化以及随应力环境的变化均具有较好的线性特性,其应力响应灵敏度为0.013 69 nm/Mpa,且这种谐振腔沿x方向和y方向的应力响应灵敏度相同;同时,这种谐振腔的共振峰主峰随温度呈分段线性变化趋势,且具有最大1.4 nm/℃的温度灵敏度.另外,计算结果显示,这种结构的光子晶体谐振腔具有很好的频率开关特性.

TM Mode Characteristics of a Photonic Crystals Resonant Cavity

A model of two-dimensional photonic band gap structures resonant cavity is proposed made by GaAs pillars in air with graphite lattice. Its TMy mode formant wavelength changing with stress and temperature is calculated by finite difference time domain method. The results show that no mater what direction for the stress acting on the resonant cavity, there will be a good linear characteristic between the formant wavelength and the stress, the sensitivity responding to stress is 0.013 69 nm/Mpa. Meanwhile, it is found that the sensitivities responding to stress along x and y direction are the same. There is a sectional linear characteristic between the main formant wavelength and temperature for this kind of photonic crystal resonant cavity, and the biggest sensitivity responding to temperature is 1.4 nm/℃. Furthermore, the results show that there is a make-and break key characteristic for the proposed resonant cavity.