University of Oulu

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.

Tunable dual-functional metasurface for wideband cross-polarization conversion and wideband absorption

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Author: DS, Chandu1; Nagini, K.B.S. Sri1; Soh, Ping Jack2;
Organizations: 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
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.2 MB)
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Language: English
Published: Elsevier, 2023
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.

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Series: Results in physics
ISSN: 2211-3797
ISSN-E: 2211-3797
ISSN-L: 2211-3797
Volume: 54
Article number: 107104
DOI: 10.1016/j.rinp.2023.107104
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Copyright information: © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (