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Sufficient condition for the existence of interface states in some two-dimensional photonic crystals
- 发表刊物：Physical Review B
- 摘要：There is no assurance that interface states can be found at the boundary separating two materials. While a strong perturbation typically favors wave localization, we show on the contrary that in some two-dimensional photonic crystals (PCs) possessing a Dirac-like cone at k= 0 derived from monopole and dipoles excitation, a small perturbation is sufficient to create interface states. The conical dispersion together with the flat band at the zone center generates the existence of gaps in the projected band structure and the existence of single mode interface states inside the projected band gap…
- 论文类型：期刊论文
- 卷号：90
- 期号：7
- 页面范围：075423
- 是否译文：否
- 发表时间：2014-08-22
- 发布期刊链接：https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.075423
