| Title |
Terahertz optics of materials with spatially harmonically distributed refractive index / |
| Authors |
Bychanok, Dzmitry ; Gorokhov, Gleb ; Plyushch, Artyom ; Ronca, Alfredo ; Lavorgna, Marino ; Xia, Hesheng ; Lamberti, Patrizia ; Kuzhir, Polina |
| DOI |
10.3390/ma13225208 |
| Full Text |
|
| Is Part of |
Materials.. Basel : MDPI. 2020, vol. 13, no. 22, art. no. 5208, p. [1-11].. eISSN 1996-1944 |
| Keywords [eng] |
terahertz bandgap ; graded index materials ; harmonically distributed refractive index |
| Abstract [eng] |
The electromagnetic properties of structures with spatially periodic distributed gradedrefractive index were investigated in the terahertz frequency range. The band structure andelectromagnetic response of material with harmonically distributed refractive index were calculatedand analyzed. The analytical expressions for frequencies of the first and second bandgap arederived. 3D printed gyroid based architectures were proven to be harmonically graded refractiveindex structures with designed bandgaps in THz frequency ranges. The transmission coefficient ofthermoplastic polyurethane-based samples were experimentally measured in the frequency range100–500 GHz and compared with theoretical results. Due to losses in the real world produced samples,the predicted response is significantly dumped in the terahertz range and only traces of band gapsare experimentally observed. This funding paves the way toward a new generation of 3D printedTHz components for gradient-index optics application. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2020 |
| CC license |
|
