@inproceedings{3f0f46b18b7b49d482eac4da341b47b3,
title = "An Ultrathin Terahertz Tri-Band Fractal Meta-Absorber for Liquid Chemical Sensing Applications",
abstract = "An ultrathin, single-layer planar terahertz meta-material absorber (MMA) is numerically demonstrated for sensing applications. The tri-band fractal MMA consists of a Cayley tree-shaped resonator deposited on a polyimide substrate. The designed absorber is polarization-insensitive and has three resonance frequencies at 3.997, 6.98, and 8.795 THz. For the absorption peak at 3.997 THz, the proposed sensor has thickness of 0.08 \$A\$ and its largest dimension is 0.45 A. The electric field map is analysed to interpret the fundamental characteristics of the three resonances. The refractive index based sensing is evaluated by placing a container on top of the resonating surface that holds the analyte. The proposed sensor exhibits a good Quality factor (Q) value of 97.7 and its highest sensitivity is 0.44 THz/RIU. The designed MMA sensor is suitable for various chemical and bio sensing purposes.",
keywords = "Cayley tree, Fractal, Metamaterial absorber (MMA), Refractive index, Sensing, Terahertz",
author = "Afzaal Ahmad and Muhammad Zubair and Kazim, \{Jalil Ur Rehman\} and Imran, \{Muhammad Ali\} and Qammer Abbasi",
note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 2025 IEEE International Workshop on Antenna Technology, iWAT 2025 ; Conference date: 19-02-2025 Through 21-02-2025",
year = "2025",
doi = "10.1109/iWAT64079.2025.10931200",
language = "English",
series = "2025 IEEE International Workshop on Antenna Technology, iWAT 2025",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2025 IEEE International Workshop on Antenna Technology, iWAT 2025",
address = "United States",
}