Theory of light propagation in strongly modulated photonic crystals: Refractionlike behavior in the vicinity of the photonic band gap

作者：Masaya Notomi · 发表于：Physical review. B, Condensed matter · 年份：2000 · DOI：10.1103/physrevb.62.10696 · 被引用次数：1341 · 研究领域：Photonic Crystals and Applications、Photonic and Optical Devices、Optical Coatings and Gratings

Although light propagation in weakly modulated photonic crystals is basically similar to propagation in a diffraction grating in which conventional refractive index loses its meaning, we demonstrate that light propagation in strongly modulated two-dimensional (2D)/3D photonic crystals becomes refractionlike in the vicinity of the photonic bandgap. Such a crystal behaves as a material having an effective refractive index controllable by the band structure. This situation is analogous to the effective-mass approximation in electron-band theory. By utilizing this phenomenon, negatively refractive material can be realized, which has interesting optical properties such as mirror-image refraction.