Highly Sensitive Terahertz Electromagnetically Induced Transparency-Like Metasurface for Refractive Index Biosensing

Pires, T., Nourinovin, S., Abbas, H. , Imran, M. A. , Alomainy, A. and Abbasi, Q. H. (2023) Highly Sensitive Terahertz Electromagnetically Induced Transparency-Like Metasurface for Refractive Index Biosensing. In: International Microwave & Antennas Symposium 2023, Cairo, Egypt, 07-09 Feb 2023, pp. 199-202. ISBN 9781665490757 (doi: 10.1109/IMAS55807.2023.10066946)

Abstract

In this research, we presented an electromagnetically induced transparency-like (EIT-like) metasurface. The structure is composed of pairs of L-shaped resonators, and by increasing the asymmetry between the coupled resonators, the dark mode has been excited with a transparency peak at 2.84 THz. The transmission spectra based on various asymmetry degree shows the intensifying trend of EIT-like resonance. The distribution of the electromagnetic field and the surface current were also examined to demonstrate the dark mode excitation. The sensing performance of the biosensor was studied based on various refractive index and thicknesses of the sample, and a total theoretical sensitivity of 800 GHZ/RIU based on a narrow line width of 230 GHz was achieved. The results also were compared with similar research works and proved a massive enhancement in sensitivity and Q-factor. The proposed structure can be served as an ultra-sensitive, inexpensive, and label-free biosensor for applications including biological sensing.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Pires, Tomas and Nourinovin, Miss Shohreh and Imran, Professor Muhammad and Abbas, Dr Hasan and Abbasi, Professor Qammer
• Authors: Pires, T., Nourinovin, S., Abbas, H., Imran, M. A., Alomainy, A., and Abbasi, Q. H.
• College/School: College of Science and Engineering > School of Engineering; College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISBN: 9781665490757
• Copyright Holders: Copyright ©2023 IEEE
• First Published: First published in 2023 International Microwave and Antenna Symposium (IMAS)
• Publisher Policy: Reproduced in accordance with the publisher copyright policy