Figure 6
From: Three-Dimensional Anisotropic Metamaterials as Triaxial Optical Inclinometers
THz TDS measurement results for the cubic inclinometer. (a) Optical image of the experimental setup for THz transmission measurement, showing a 500 µm cube placed on the circular aperture with the inset showing the polarization direction of the THz wave. (b) Measured transmission response displaying the ability of the cube to distinguish various angles when rotated about any axis through a change in transmission. (c) Measured transmission response demonstrating a clear change in transmission and breaking of the 180° isotropy of the cube. (d) Measured frequency spectra of the cubic structure observed while rotating the cube about the direction of wave vector (k) in steps of 40° (e) Measured variation in the transmission response at the fundamental resonant frequency of the 3 resonators defined on the faces of a cube when rotated along the wave vector (k).
