ICO-24 Tomohiro Tetsumoto

F1E-02: Topological Edge States by Resolving Weyl Points in Semiconductor Chiral Woodpile Photonic Crystals

Presentation by Dr. Takahashi, Univ. of Tokyo and Kyoto Institute of Technology, on the investigation of topological properties in 3-D chiral photonic crystal structures. He showed that the topological edge state (Weyl point) is retained under the light line and its polarization state. The key point is that the Weyl point has the potential to be used for experiments in the telecommunication light band by reducing the structure size to the sub-micrometer range, whereas previous experimental observations of the Weyl point have been limited to large structures in the microwave range. The same group has already published a paper (still only in arXiv?) on experimental investigation of the polarization dependence of emission from circularly polarized excitation of quantum dots using a similar chiral structure. ), the experimental demonstration of this phenomenon is now becoming more realistic.