[22p-A308-1~17] 3.10 Photonic structures and phenomena (formerly 3.11)

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[22p-A308-6] Experimental demonstration of photonic topological phase transition with selectively loaded Ge₂Sb₂Te₅

〇Takahiro Uemura^1,2, Hisashi Chiba^1,2, Taiki Yoda^1,2, Yuto Moritake¹, Yusuke Tanaka², Eiichi Kuramochi^2,3, Masaaki Ono^2,3, Masaya Notomi^1,2,3 (1.TokyoTech, 2.NTT BRL, 3.NTT NPC)

Keywords:

photonic crystal,topological photonics,phase-change material

Edge modes at the interface of photonic topology have some interesting properties, such as immunity to bending and pseudospin-momentum locking. Most previous research has shown that photonic topology is generated by built-in spatial structures. In our previous publication, we proposed a reconfigurable photonic topological insulator based on Ge₂Sb₂Te₅ (GST), a well-known phase-change material with a large refractive index contrast between the amorphous and crystalline phases. In this work, we report an experimental demonstration of the photonic topological phase transition by material phase transition.