Ds, C., Nagini, K. B. S. S., Soh, P. J., & Karthikeyan, S. S. (2023). Tunable dual-functional metasurface for wideband cross-polarization conversion and wideband absorption. Results in Physics, 54, 107104. https://doi.org/10.1016/j.rinp.2023.107104
Tunable dual-functional metasurface for wideband cross-polarization conversion and wideband absorption
|Author:||DS, Chandu1; Nagini, K.B.S. Sri1; Soh, Ping Jack2;|
1School of Electronics Engineering, VIT-AP University, Amaravati, Andhra Pradesh, India
2Faculty of Information Technology and Electrical Engineering, University of Oulu, Finland
3Electronics and Communication Engineering, NIT Tiruchirappalli, India
|Online Access:||PDF Full Text (PDF, 3.2 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe20231107143472
|Publish Date:|| 2023-11-07
This work presents a tunable and wideband dual-functional metasurface (DFM) operating in the terahertz regime with highest overlap bandwidth (OBW). The structure consists of a double-split ring resonator and a meandered square ring resonator based on VO₂ to achieve reflective cross-polarization conversion and absorption functionalities, respectively. When the phase changing material VO₂ is in its metallic state, the metasurface acts as a perfect absorber with a peak absorption of ≥ 90% over the operating band of 2.3–4.01 THz. When VO₂ is in its insulating state, the metasurface acts as a reflective cross-polarization converter over a wideband from 1–4.1 THz with high polarization conversion ratio of ≥ 90%. The proposed DFM has a stable response up to 45° of incidence in the polarization converter state and 60° of angular stability under the absorber state. Further, tunability is achieved by integrating photoconductive silicon and controlling the optical pump intensity in the double-split ring and meandered . square ring resonators. The proposed metasurface finds its applications in security, detection and THz communication systems.
Results in physics
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).