ICO-24 Tomohiro Tetsumoto

2017-01-18 2022-09-24 miyahara

Research

ICO-24 Participation Report

Ph.D.3Tomohiro Tetsumoto, senior

Outline

I attended ICO-24 held at Keio Plaza Hotel from August 21 to 25, ICO-24 stands for The 24th Congress of the International Commission for Optics. I had an impression that there were many participants from Japanese research institutes because it was a domestic conference. Since the opening ceremony was attended by His Majesty the Emperor of Japan, the conference must have left a lasting impression on many people.

2. regarding his/her presentation

The presentation was about the coupling experiment between a toroidal resonator and a photonic crystal waveguide. The presentation was somewhat jammed due to many last minute improvements to the slides, but it was successfully completed within the time limit. During the Q&A session, I was asked about important factors for obtaining coupling efficiency and theoretical limits of efficiency. The direction for the calculation is becoming clear, and I would like to obtain theoretical support before the next presentation.

3. Topic Introduction

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.