| Autor: |
Yaxi Pan, Jian Dong, Meng Wang, Heng Luo |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Results in Physics, Vol 57, Iss , Pp 107376- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2211-3797 |
| DOI: |
10.1016/j.rinp.2024.107376 |
| Popis: |
In this paper, a tunable ultra-wideband terahertz (THz) metasurface absorber utilizing vanadium dioxide (VO2) has been designed with the assistance of the Binary Grey Wolf Optimization algorithm. The electromagnetic absorption characteristics and the physical absorption mechanism of the proposed absorber are modeled and numerically simulated based on wave interference cancellation theory and impedance matching theory. Further discussion of field distributions is undertaken to elucidate the underlying physical mechanisms of this absorber. Remarkably, the absorber achieves absorption rates exceeding 90% within the frequency range of 2.83 to 8.46 THz. Through the manipulation of VO2 conductivity, the absorber allows dynamic amplitude adjustment ranging from 1.2% to 97%. Compared to previous studies, the proposed absorber exhibits substantial advantages in terms of absorption bandwidth, polarization insensitivity, and wide-angle absorption. Its potential applications encompass modulators, cloaking devices, chemical energy absorption, and other terahertz domains. The proposed structure and design methodology of the tunable ultra-wideband terahertz absorber can provide valuable references for the investigation of novel multifunctional terahertz devices. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
