[17p-A25-2~11] 4.2 Photonics Devices, Photonic Integrated Circuit and Silicon Photonics

17:30 〜 17:45英語発表

[17p-A25-9] On-Chip Terahertz Polarization Control Enabled by Effective Medium

〇(P)Weijie Gao¹, Withawat Withayachumnankul², Masayuki Fujita¹ (1.Osaka Univ., 2.Univ. Adelaide)

キーワード：

Terahertz on-chip、Polarization control、Effective medium

We have proposed a solution for terahertz wave on-chip transmission, filtering, and polarization manipulation with unprecedented performance based on the concept of effective medium. The effective medium is realized by periodically perforating the silicon slab with a period in the deep subwavelength region. As a result, the effective medium can be treated as a homogenous material within the operation frequency range with a tailorable anisotropic permittivity tensor that is only mildly frequency dependent. The unique characteristics of the effective medium play a critical role in enhancing the performance of various terahertz integrated devices. In particular, the anisotropy of the effective medium can significantly increase the polarization extinction ratio (PER) for polarization beam splitters and rotators. This study mainly focuses on the impacts on PER of a terahertz integrated polarization rotator enabled by the effective medium.