Presentation Information
[10p-B11-14]Optical vortex generation from flatband localized modes in twist-stacked moiré photonic crystal bilayers
〇(DC)Stepan Maksimovich Trushin1, Takahiro Ito1, Shuma Ito1, Satoshi Iwamoto2, Yasutomo Ota1 (1.Keio University, 2.RCAST, Tokyo Univ.)
Keywords:
Moire,Photonic crystals
Moiré photonic crystal (PhC) bilayers have attracted significant attention due to their intriguing optical properties including moiré flatband light localization[1]. Recent works have demonstrated that moiré PhCs enable the generation of optical vortices[2]. However, the reported approach relies on external laser irradiation with careful control over the irradiation angle and polarization. In this study, we numerically analyzed twist-stacked moiré PhC bilayers and found that their flatband modes can directly generate optical vortices. The vortex emission persists across a wide range of twist angles, highlighting the potential of moiré flatbands as a platform for compact vortex light sources.
[1] M. Oudich, et al., Nat. Mater. 23, 1169 (2024).
[2] T. Zhang, et al. Nat Comm 14, 6014 (2023).
[1] M. Oudich, et al., Nat. Mater. 23, 1169 (2024).
[2] T. Zhang, et al. Nat Comm 14, 6014 (2023).