[14p-K505-1~14] 3.10 Photonic structures and phenomena

4:45 PM - 5:00 PM JST(7:45 AM - 8:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[14p-K505-12] Photonic topological phase transition using transparent phase change material Sb₂Se₃

〇Takahiro Uemura^1,2, Yuto Moritake¹, Masaaki Ono^2,3, Eiichi Kuramochi^2,3, Hisashi Sumikura^2,3, Masaya Notomi^1,2,3 (1.Science Tokyo, 2.NTT BRL, 3.NTT NPC)

Keywords:

photonic crystal,topological photonics,phase-change material

Topological photonics, which applies the concept of topology in electronic systems to light waves, is an great candidate for the waveguides with the chirality and immune to reflection. The control fo photonic topology after fabrication has been a long-standing issue, and we have recently experimentally demonstrated an photonic topological phase transition using a phase-change material, Ge₂Sb₂Te₅ (GST). We now report our recent demonstration of band inversion using nano-patterned Sb₂Se₃, a transparent phase-change material with extremely low loss (κ < 10^-3 [3]) at telecommunication wavelength.