基于光子晶体自准直和带隙效应的马赫-曾德尔干涉仪设计

Mach-Zehnder interferometer designed based on self-collimating beams and photonic band gap in photonic crystals

结合能带图和等频图分析,基于光子晶体自准直和光子带隙效应,设计了一种紧凑、高效的全光子晶体马赫-曾德尔(MZ)干涉仪.相应的光分束器和反射镜均由缺陷结构的光子晶体实现.讨论了干涉仪的输出机理,并与时域有限差分法(FDTD)模拟结果进行了比较.结果分析表明可以把MZ干涉仪作为一种气体、液体微型探测器.可在集成光学中起到重要的作用.

We propose a compact,high efficient full photonic crystal Mach-Zehnder（MZ） interferometer based on the selfcollimation and photonic band gap in two-dimensional photonic crystals.Line defected photonic crystals are used as the beam splitter and the mirror.The interference theory is used to discuss the interferometer output mechanism,and compared with the finite-difference time-domain（FDTD） simulation results.The designed MZ interferometer can surve as micro-detectors of gas and liquid,which may play an important role in integrated optics.