提出了含有电光材料LiNbO3 的一维三元光子晶体结构，利用传输矩阵法，研究了在外电场作用下缺陷共振峰的波长可调谐滤波特性。在不改变光子晶体几何外形尺寸的情况下，通过改变施加于电光材料LiNbO3 上的外电场调节其折射率，使得带隙内产生的强局域、高透射、窄宽度的缺陷共振峰发生偏移，从而实现滤波器的可调谐特性。数值模拟结果表明，在近红外波段，缺陷共振峰随外电场的增加向短波长方向线性移动；同时，在固定外电场作用下，随着入射角度的增大，光子带隙将整体向着短波长方向平移，且带隙内的缺陷共振峰随之发生同步移动。以上这些特性，可应用于近红外波段的波长可调谐滤波器件中。

A new one-dimensional ternary photonic crystal containing electro-optical material LiNbO3 is proposed. Based on transmit matrix method, the photonic band-gap varied with external field is simulated and analyzed in near infrared region. The simulation results show that the defect mode is found to merge inside photonic band-gap with the impact of external field, and the peak wavelength of defect mode can be tuned by adjusting the external field. Moreover, the angle-dependent peak position of defect mode is also examined, which opens a promising way to design tunable wavelength filters in near infrared region.