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基于光子晶体的光子局域特性,并利用光子晶体的介观压光效应,提出了一种新型的双通道可调滤波器结构.采用传输矩阵法对该滤波器的光学传输特性进行了理论推导,建立了透射谱与光子晶体结构参数的关系,讨论了介观压光效应对双缺陷光子晶体透射谱的影响,并对所设计的光子晶体结构进行了数值模拟.结果表明:随着入射角度的增大,缺陷峰发生蓝移.随着各介质层折射率或几何厚度的增加,缺陷峰发生红移.当光子晶体发生轴向拉伸应变时,缺陷峰的位置向长波长移动,但缺陷峰的峰值大体不变,从而验证了此滤波器的可调节性.该光子晶体滤波器结构紧凑,可调谐性好,为光子晶体激光器及传感器的设计提供了一定的理论参考.
Based on photon local characteristics of photonic crystals and using mesoscopic calendaring effect of photonic crystals, a novel dual-channel tunable filter structure is proposed. The optical transmission characteristics of the filter are theoretically deduced by transfer matrix method , The relationship between the transmission spectra and the photonic crystal structure parameters was established and the influence of the mesoscopic calendering effect on the transmission spectra of the double defect photonic crystals was discussed.The photonic crystal structure was numerically simulated.The results show that with the incident angle With the increase of the refractive index or geometric thickness of each medium layer, the defect peak redshifts.When the photonic crystal undergoes axial tensile strain, the position of the defect peak shifts to the long wavelength, however, The peak value of the defect peak is generally unchanged, which verifies the tunability of the filter.The photonic crystal filter has a compact structure and good tunability, which provides a theoretical reference for the design of photonic crystal lasers and sensors.