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采用三维时域有限差分算法(3D-FDTD)对GaAs/AlGaAs量子阱红外探测器(QWIP)的顶部光子晶体光输入耦合层结构的电磁场分布进行了仿真分析,得到了多种不同周期、占空比、深度的二维光子晶体结构耦合效率及电磁场分布.探索了一种双色探测器的光子晶体光输入耦合层结构的设计思路,使之可对中波/长波或长波双色8/12μm同时提供较高的耦合效率.
The electromagnetic field distribution of the top photonic crystal optical coupling layer structure of GaAs / AlGaAs quantum well infrared detector (QWIP) was simulated by 3D finite-difference time-domain (3D-FDTD) algorithm. Ratio and depth of the two-dimensional photonic crystal structure coupling efficiency and electromagnetic field distribution of a two-color detector photonic crystal light coupling layer structure design ideas to make it suitable for the medium wave / long wave or long wave two-color 8 / 12μm at the same time Higher coupling efficiency.