| Autor: |
Tao, Hu, Landy, Nathan I., Bingham, Christopher M., Zhang, Xin, Averitt, Richard D., Padilla, Willie J. |
| Rok vydání: |
2008 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1364/OE.16.007181 |
| Popis: |
We present a metamaterial that acts as a strongly resonant absorber at terahertz frequencies. Our design consists of a bilayer unit cell which allows for maximization of the absorption through independent tuning of the electrical permittivity and magnetic permeability. An experimental absorptivity of 70% at 1.3 terahertz is demonstrated. We utilize only a single unit cell in the propagation direction, thus achieving an absorption coefficient $\alpha$ = 2000 cm$^{-1}$. These metamaterials are promising candidates as absorbing elements for thermally based THz imaging, due to their relatively low volume, low density, and narrow band response. |
| Databáze: |
arXiv |
| Externí odkaz: |
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