光子晶体压力传感器的基本原理

The principles of pressure sensors based on photonic crystal

通过研究一维光子晶体受压力后其光带隙性能的变化 ,提出了光子晶体压力传感器的原理 .计算表明 ,压力的大小与禁带起始波长、截止波长和禁带宽之间呈简单的线性对应关系 .这就提供了通过测量光带隙性能而感知外载荷或者通过施加载荷而调制光带隙性能的可能 .由于光子晶体的结构周期和光波波长为一个数量级 ,也就有可能制造出一系列精巧的压力。

The mechanism of photonic crystal pressure sensor was described in this paper, after an examination of the relationship of the pressure on a one-dimensional photonic crystal and its photonic band gap (PBG) property. The results show that there is a simple relationship between the pressure and the stop wave length. This makes it possible to know the load by studying the PBG property or to change the PBG property by loading; the loads can be mechanical loads or thermal loads. Since the structure scale is similar to the wave length, it is possible to realize a series of sensors with very high exactness.