Vanadium Dioxide-assisted Dual Band Polarization-insensitive Metamaterial Absorber for Terahertz Applications
| Authors | Mahesh Valathuru1, Pokkunuri Pardhasaradhi1, Suresh Dannana2, Nagandla Prasad2, B.T.P. Madhav1 , Sudipta Das3 |
| Affiliations |
1ALRC Research Centre, Department of ECE, Koneru Lakshmaiah Education Foundation, Guntur, Andhra Pradesh, India 2Department of Electronics and Communication Engineering, GMR Institute of Technology, Rajam, 532127 Andhra Pradesh, India 3Department of Electronics and Communication Engineering, IMPS College of Engineering and Technology, Malda 732103 West Bengal, India |
| Е-mail | pspokkunuri@kluniversity.in |
| Issue | Volume 17, Year 2025, Number 2 |
| Dates | Received 12 February 2025; revised manuscript received 18 April 2025; published online 28 April 2025 |
| Citation | Mahesh Valathuru, Pokkunuri Pardhasaradhi, et al., J. Nano- Electron. Phys. 17 No 2, 02021 (2025) |
| DOI | https://doi.org/10.21272/jnep.17(2).02021 |
| PACS Number(s) | 78.67.Pt, 87.50.U |
| Keywords | Absorber (3) , Metamaterial (2) , Vanadium dioxide (VO2). |
| Annotation |
The purpose of this research is to provide a thorough design and analysis of vanadium dioxide (VO2)-based THz metamaterial absorbers. The three-layer designs of the proposed metamaterial absorbers (MMAs) include a radiating element of vanadium dioxide (VO2) with 0.2 μm thick, a dielectric substrate of polyimide with a dielectric constant of 3.5, and a ground conducting layer of gold (Au) with an electrical conductivity of 4.56e + 07 S/m to prevent electromagnetic wave propagation. The overall size of the proposed structure is 34 x 36 x 7.4 μm3. The two absorption peak frequencies at which the unit cell MMA operates are 4.4 THz and 9.68 THz. The maximum absorption percentages in the operating frequency ranges are 96 % and 98 %, and they span from 4 to 4.8 THz and 9.5 to 11.4 THz respectively. It is highly advantageous to comprehend the conductive phenomena of the VO2 radiating patch to achieve a high percentage absorption for the relevant absorption frequency band. Moreover, the insensitivity of absorptance to the polarization angle is verified. Additionally, parametric analysis is performed for various design parameters on the absorption response of suggested absorber. Furthermore, the impact of polarization angle on absorbance for TE and TM modes is presented. The prescribed dual band terahertz absorber could be suitable for cloaking, imaging, detection and electromagnetic shielding. |
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List of References |
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