[18p-A34-1~16] 3.10 Photonic structures and phenomena

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[18p-A34-8] Loss loading dependence of chiral emission modes in non-Hermitian photonic crystals

〇Takumi Harada^1,2, Satoshi Suzuki^1,2, Shutaro Otuka^1,2, Yuto Moritake¹, Eiichi Kuramochi^2,3, Masaaki Ono^2,3, Takuo Fujii^3,4, Shinji Matsuo^3,4, Masaya Notomi^1,2,3 (1.Tokyo Tech, 2.NTT BRL, 3.NTT NPC, 4.NTT DTL)

Keywords:

photonic crystals,chirality,circular polarization emission

The phenomenon of circular polarization reflection exhibiting chirality due to non-Hermitian two-dimensional photonic crystals has been reported. In our previous presentations, we observed chirality at the Γ point through circular polarization reflection measurements in graphene-loaded Si photonic crystals (PhC). This time, to achieve circularly polarized emission, we changed the substrate to InGaAsP and aimed to achieve a high Q-factor by utilizing Bound States in the Continuum (BIC) and optimizing the absorption material and loading position. We report the numerical analysis results of these optimizations.