[22p-B102-1~10] Revisiting semiconductor light-emitting materials and optical characterization by unique spectroscopic approaches

[22p-B102-4] Optical properties of diamond as an ultrawide bandgap semiconductor

〇Nobuko Naka¹ (1.Kyoto Univ.)

Keywords:semiconductor, solid-state spectroscopy, diamond

Diamond is an extreme semiconductor exhibiting exceptionally high breakdown voltage, radiation tolerance, and thermal conductivity among ultrawide bandgap materials. Owing to the high exciton binding energy originating from the wide bandgap, diamond provides an attractive arena to explore quantum many-body physics on coexistent states of charge carriers, excitons, polyexcitons, and electron-hole droplets. In the presentation, recent progress in the experimental approach to the optical properties of photoexcited carriers near the indirect bandgap of diamond will be introduced along with the prospects of the research.