Dual-band polarization-independent maze-shaped absorber based on graphene for terahertz biomedical sensing
Year: 2024
Type: article
Abstract: This paper introduces an adjustable metamaterial absorber in terahertz spectrum which has exclusive properties such as resistance to polarization variation. Although this absorber can operate in various applications like chemical and environmental industries, its captivating features in different refractive index (RI) make it a good choice to use in sensing and biomedical applications like cancer early detection, blood glucose, and detecting malaria mosquito bites. The structure originally includes of four different layers that from top to bottom follows: graphene/ SiO2/Si/Au, Respectively, and the finite integration technique has been used in simulation. In terms of absorbing parameters the proposed structure shows an excellent absorption of 98.32% at 4.3 THz and 98.49% at 7.35 THz with an average Q-factor of 8.92 by following simple absorption rules, simulation and electrical field distribution of the suggested structure is illustrated through diagrams to take various parameters such as frequency, sensitivity and physical mechanism into consideration.
Source: Optics Express
DOI: 10.1364/oe.545227
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Funder: Semnan University
OpenAlex ID: W4405380492