[20p-A101-1~16] 3.10 Photonic structures and phenomena (formerly 3.11)

[20p-A101-7] Zero-refractive index states using the Dirac cone at the K-point in photonic crystals

〇(M1)Sho Watanabe^1,2, Kento Kawasaki^1,2, Yuto Moritake¹, Masaaki Ono^2,3, Eiichi Kuramochi^2,3, Masaya Notomi^1,2,3 (1.Tokyo Tech, 2.NTT BRL, 3.NTT NPC)

Keywords:photonic crystal, zero refractive index, Dirac cone

Recently, some studies on zero-refractive index states using the Dirac cone at the Γ point in photonic crystals have been reported. In this study, we focused on the Dirac cone at the K point of the honeycomb lattice, which is located below the light line, in order to decrease the radiation loss. Through simulation and experiment, we observed the diffuse propagation of light at the Dirac cone at the K point, which is characteristic of the zero-refractive index states.