[Th-P] Nanophotonics

[Th-P-71] Chiral Perfect Transmission Enabled by Interference between Bound States in the Continuum and Toroidal Dipole Modes in Dielectric Metasurfaces

〇Yaokai Tian¹, Junichi Takahara^1,2 (1. Applied Physics, Graduate School of Engineering, The University of Osaka (Japan), 2. Photonics Center, School of Engineering, The University of Osaka (Japan))

We demonstrate a high-Q chiral transmission mechanism in a dielectric metasurface arising from the interference between a bound state in the continuum and a toroidal dipole mode. The design enables full control of transmitted amplitude and phase with polarization conversion efficiency up to 98%