Presentation Information
[15p-PA1-19]Analysis of Optical Absorption with Graphene/Si and Ge Metasurface structures in Near and Mid Infrared Wavelengths
〇Junichi Fujikata1, Hiroki Maeda1, Junichi Takahara2 (1.Tokushima Univ., 2.Univ. of Osaka)
Keywords:
metasurface,graphene
In this study, we analyzed the effects of structural asymmetry in the light incident direction and substrate material absorption on optical absorption based on degenerate critical coupling in the near- and mid-infrared wavelength bands using Si and Ge metasurface structures.We found that by using transparent substrates such as SiNx, optical absorption of approximately 80% can be achieved in the near- and mid-infrared wavelength bands.