Table 6 Electrical and electromagnetic properties of metals in the THz range22,23.
From: A high-performance ultra-compact plasmonic metamaterial structure for optical THz absorption
Material | Conductivity (S/m) | Permittivity (ε) | Permeability (µ) | Remarks |
|---|---|---|---|---|
Gold (Au) | ~ 4.1 × 10⁷ | Negative in the optical range | 1 (non-magnetic) | High reflectivity |
Cobalt (Co) | ~ 1.6 × 10⁷ | Moderate | ~ 1.26 | Magnetic properties influence absorption |
Nickel (Ni) | ~ 1.43 × 10⁷ | Moderate | ~ 600 | Absorption is significant at around 700 THz, due to high ferromagnetic material. |
Titanium (Ti) | ~ 2.38 × 10⁶ | Low | ~ 1 | High reflection occurs at the designed thickness in the given frequency range. |
Tungsten (W) | ~ 1.79 × 10⁷ | - | ~ 1 | High reflection occurs at the designed thickness in the given frequency range. |
