利用电化学腐蚀的方法制备了大多孔硅两维光子晶体 .结构图形对称性为正方格子 ,其结构参数为正方形晶格周期a =4 4 μm ,正方形空气柱的边长l=2 μm .并用显微红外光谱仪表征了光谱性质 ,揭示了所制备两维光子晶体样品的中红外波段光子的反射特性 Porous silicon two-dimensional photonic crystals were prepared by electrochemical etching.The structural symmetry of the structure was a square lattice with a square lattice period a = 4 4 μm and a side length l = 2 μm for the square air column The properties of the spectra were characterized by the microscopic infrared spectrometer. The reflection characteristics of the mid-infrared photons in the prepared two-dimensional photonic crystal