| Autor: |
Arose C, Terracciano AC, Peale RE, Vasu SS |
| Jazyk: |
angličtina |
| Zdroj: |
Optics letters [Opt Lett] 2022 Mar 15; Vol. 47 (6), pp. 1514-1516. |
| DOI: |
10.1364/OL.449308 |
| Abstrakt: |
Polarization- and incident-angle-independent narrow-band terahertz (THz) absorbers were developed to enable THz imaging, radar, and spectroscopy applications. The design comprises a transparent fused silica (SiOx) substrate backed by an optically thick metal layer and topped by a periodic array of metal cross patterns. Finite element analysis (FEA) simulations optimized the geometry of devices fabricated by contact photolithography. Resonances were characterized by Fourier-transform reflectance spectroscopy. The design tunable absorption bands appeared in the range 50-200 cm -1 (1.5-6 THz) with full widths at half maximum of 20-56 cm -1 (0.6-1.68 THz). Maximum absorption was -8.5 to -16.8 dB. The absorption bands are independent of incidence angle and polarization in agreement with simulation. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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