提出并优化了由单排渐变介质波导构成的二维空气孔型光子晶体负折射平板透镜表面的减反层,改善了成像质量.二维时域有限差分模拟计算结果表明,采用减反层后,在入射角小于23°的范围内,在使得有效折射率neff=-1的工作频率处,光子晶体表面对从空气一侧入射的平面波的反射率可降低到1%以下. The antireflective layer on the surface of a two-dimensional air-hole photonic crystal negative refraction flat lens composed of a single row of tapered dielectric waveguides is proposed and optimized to improve the imaging quality. Two-dimensional finite-difference time-domain simulation results show that the anti- , The reflectance of the photonic crystal surface to the plane wave incident from the air side can be reduced to 1% or less at an operating frequency such that the effective refractive index neff = -1 in the incident angle range of less than 23 °.