光子晶体平板第三个能带中频率的负折射和亚波长成像
摘要
Negative refraction and subwavelength imaging properties of a two-dimensional (2D) photonic crystal (PC) slab are studied by the finite-difference time-domain method. The PC consists of a triangular lattice of air holes immersed in a dielectric. For a certain frequency range in the third photonic band, the directions of the group velocities and the phase velocities can be opposite, so the PC can work as a kind of negative refractive-index material. The light radiated from a point source can form a subwavelength image spot through the PC slab. Negative refraction and an effective refractive index of the PC slab n = -1 can be achieved for the incident wave with its incident angle within a certain range.
引用本文（GB/T 7714）
Shuai Feng, Cheng Ren, Degang Xu, 等. 光子晶体平板第三个能带中频率的负折射和亚波长成像[J]. Chinese Optics Letters, 2009.
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