Figure 1

(Color) (a) Scanning electron microscopy image of an investigated sample (structure B); polarization of the incident wave: $E\parallel x$ and $H\parallel y$. (b) Spatial distribution of the electric field inside an STO rod at 0.264 THz. (c) Spatial distribution of the resonant magnetic field $H_y$ in a single unit cell of the metamaterial illuminated by a plane monochromatic wave with unitary amplitude. Dotted rectangles indicate the cross section of STO rods. Above the plots the frequencies of the incident waves and the maxima $\left|H_{\text{max}}\right|$ of the amplitude scale for each case are indicated. Top panels: amplitude; bottom panels: phase. Data in (b) and (c) were calculated for structure A at room temperature.Reuse & Permissions

Figure 2

(Color) Transmittance spectra (amplitude and phase) of the metamaterials for a few representative temperatures (left panel: structure A; right panel: structure B). Points: measurements; lines: calculations using transfer matrix method. Insets: real part of the permeability retrieved from the simulations.Reuse & Permissions

Figure 3

(Color online) Effective complex magnetic permeability of sample A; symbols: experiment, solid lines: simulations. Arrows indicate frequencies shown in Fig. 1c.Reuse & Permissions

Figure 4

(Color online) Dispersion curves (left panel) and amplitude transmission functions (right panel) of the investigated STO metamaterials calculated by the transfer matrix method. Inset: unit cell ($L=75\mu \text{m}$, $t=52\mu \text{m}$, and $w=42\mu \text{m}$). Investigated structures: (a) sample composed of 16 unit cells along $z$-axis (solid line); (b) single unit cell along $z$-axis including $23\text{−}\mu \text{m}$-thick air spacer (symbols); (c) single period along $z$-axis without the air spacer corresponding to the evaluations shown in Fig. 3 (dashed line).Reuse & Permissions