[19a-PA2-1~26] 3.9 Terahertz technologies

[19a-PA2-11] Three dimensional extension of displacement vector in moiré type metasurfaces

〇Seigo Ohno¹, Teruya Ishihara¹ (1.Tohoku Univ.)

Keywords:metasurface, geometric phase

We have defined a two-dimensional displacement vector field for a two-dimensional moiré pattern and revealed that the corresponding moiré type metasurface provides the geometric phase appearing in the vector fields to a transmitted light. Here, we extend the displacement vector to three-dimensional vector in order to treat the oblique incidence of the electromagnetic wave to the moiré type metasurfaces with anisotropic distortion. We try to understand the anomalous refraction on such moiré type metasurfaces from the point of view of the vector field distribution.