Table 3.
Comparison of important properties of THz absorbers.
| References | Absorption Bandwidth (THz) 1 | Material | Layers | Stable Incident Angle | Polarization Insensitivity |
|---|---|---|---|---|---|
| [19] | 2.76 (2.14–4.90) | Graphene | 1 | Up to 60° | Insensitive |
| [11] | 3.7 (1.95–5.65) | Gold | 1 | Up to 20° | Insensitive |
| [1] | 0.76 (4.80–5.56) | Graphene | 3 | Up to 60° | Insensitive |
| [18] | 2.2 (0.6–2.8) | Graphene | 3 | Up to 60° | Insensitive |
| [22] | 3.5 (6.98–9.1) | Graphene | 3 | Up to 60° | Insensitive |
| This work | 6.11 (4.5–10.61) | Graphene and VO2 (0.8 eV insulator state) | 3 | TE up to 55° TM up to 60° |
Insensitive |
| 0.83 (3.78–4.61) 1.19 (6.75–7.94) |
Graphene and VO2 (0.8 eV metallic state) | 3 | TE up to 60° TM up to 65° |
Insensitive | |
| 0.84 (4.81–5.65) | Graphene and VO2 (0 eV metallic state) | 3 | TE up to 65° TM up to 65° |
Insensitive |
1 Bandwidth of absorption over 90%.