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

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[18p-A34-10] Experimental observation of zero-refractive index states at M-point in photonic crystals

〇Koumei Hamaya^1,2, Sho Watanabe^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:

Zero-index materials,Photonic crystals

Recently, zero-index materials (ZIM) is attracting attention in terms of various applications. We experimentally observed zero-refractive index states with M-point Dirac cone of the core-shell photonic crystals. Through propagation measurements, we confirmed long-distance propagation, unique diffusion phenomena and low trancemittance in such condition. And refractive index measurements, we observed low refractive index (about 0.05) at Dirac-point frequency. So it is expected to apply light diffusion effect at Dirac-point to short-distance optical distributors.