[24p-11F-1~11] 3.11 Nanoscale optical science and near-field optics (formerly 3.12)

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)

[24p-11F-8] Hollow silicon metasurface perfect absorber with monolayer graphene

〇(M2)Kotaro Miyata¹, Masaki Hashimoto², Takuya Iwasaki³, Kenji Watanabe³, Takashi Taniguchi³, Junichi Fujikata⁴, Junichi Takahara^1,5 (1.Osaka Univ. G. Eng., 2.Osaka Univ. Eng., 3.NIMS, 4.Tokushima Univ., 5.Photonics Ctr.)

Keywords:

metasurface

Graphene is expected to be applied to ultrafast optical devices since it has remarkable optical properties. However, the absorptivity of monolayer graphene is only about 2.3%, which is not sensitive enough to be applied to optical devices. In this study, we have achieved a perfect absorber at 1.55 μm by satisfying the degenerate critical coupling condition on a hollow silicon methasurfaces supported by monolayer graphene. The hollow metasurfaces were fabricated by Bosch process and the mechanically peeled graphene was transferred onto the metasurfaces with polymer stamps.