[11p-N205-1~12] CS.5 3.11 フォトニック構造・現象、3.12 ナノ領域光科学･近接場光学のコードシェアセッション

▼ [11p-N205-9] Faraday rotation in a magnetic metasurface based on circular truncated nanocones

〇(D)Siyuan Gao^1,2、Yasutomo Ota³、Feng Tian¹、Tianji Liu¹、Satoshi Iwamoto^1,2 (1.RCAST, Univ. Tokyo、2.IIS, Univ. Tokyo、3.Keio Univ.)

キーワード：Magneto-optical Effect, Electromagnetically Induced Transparency, Metasurface

Monocrystalline yttrium iron garnet (YIG) is one of the most promising materials in the study of magneto-optical (MO) devices for its moderate MO effect and low loss in the telecommunication band. Recently, all-dielectric MO metasurfaces have been numerically demonstrated to exhibit giant enhancement of Faraday rotation as well as high light transmission when employing electromagnetically induced transparency (EIT) effect. The device structures considered there assume to possess perfectly vertical sidewalls in the nanopatterned MO materials. Unfortunately, the fabrication of such steep sidewalls is rather challenging for YIG-based materials. For actual implementations, it is therefore necessary to assess Faraday rotation in MO metasurfaces with tilted sidewalls.