期刊
PHYSICAL REVIEW LETTERS
卷 122, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.117401
关键词
-
资金
- U.S. Department of Energy (DOE) Office of Science [DE-FG02-07ER46405]
- Air Force Office of Scientific Research [FA9550-16-1-0019]
- MURI [FA9550-17-1-0002]
- National Science Foundation [DMR-1809915, EFRI-1641069]
- research program of the Netherlands Organization for Scientific Research (NWO)
- European Research Counsel [SCEON 695343]
We study two-dimensional hexagonal photonic lattices of silicon Mie resonators with a topological optical band structure in the visible spectral range. We use 30 keV electrons focused to nanoscale spots to map the local optical density of states in topological photonic lattices with deeply subwavelength resolution. By slightly shrinking or expanding the unit cell, we form hexagonal superstructures and observe the opening of a band gap and a splitting of the double-degenerate Dirac cones, which correspond to topologically trivial and nontrivial phases. Optical transmission spectroscopy shows evidence of topological edge states at the domain walls between topological and trivial lattices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据