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Optical filter based on two coupled PhC GaAs-membranes

机译:基于两个耦合的PhC GaAs膜的滤光片

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摘要

We demonstrate an ultracompact optical filter based on two coupled high-index contrast GaAs photonic crystal (PhC) membranes. The PhC membranes consist of a square lattice of air holes and behave as a Fabry-Perot cavity whose reflectivity and transmissivity depend on the air gap between the two membranes. The normal-incidence reflectance measurements and the numerical simulation of reflection spectra show a high sensitivity to the geometrical parameters, such as the distance between the slabs, whose control would make the device suitable for a new class of tunable optical filters.
机译:我们演示了基于两个耦合的高折射率对比砷化镓光子晶体(PhC)膜的超紧凑型滤光片。 PhC膜由气孔的方格子组成,并表现为Fabry-Perot腔,其反射率和透射率取决于两个膜之间的气隙。法向入射反射率测量和反射光谱的数值模拟显示出对几何参数(例如平板之间的距离)的高度敏感性,其几何形状的控制将使该设备适合于新型可调光学滤波器。

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