High-Sensitivity Temperature Sensor Based on the Perfect Metamaterial Absorber in the Terahertz Band

Abstract

In this study, a perfect metamaterial absorber (PMMA) based on an indium antimonide temperature-sensitive material is designed and investigated in the terahertz region. We demonstrate that it is an ideal perfect narrow-band absorber with polarization-insensitive and wide-angle absorption properties. Numerical simulation results show that the proposed PMMA can be operated as a temperature sensor with a sensitivity of 21.9 GHz/K. A graphene layer was added to the PMMA structure to improve the sensitivity, and the temperature sensitivity was increased to 24.4 GHz/K. Owing to its excellent performance, the proposed PMMA can be applied in thermal sensing, detection, and switching.

Highly Sensitive Triple-Band THz Metamaterial Biosensor for Cancer Cell Detection

“…This is because of the increase in the equivalent inductance and capacitance of the proposed sensor as the stripe width increases. Accordingly, the resonance frequency decreases [29], [51]. In Fig.…”

“…As the dielectric layer thickness h increases the equivalent inductance of the polyimide layer should be increased which decreases the equivalent capacitance between the two metallic plates. Whereas the decrease in the equivalent capacitance is somewhat less than the increase in the inductance, as a result, a decrease in the resonant frequency is obtained [56]. Further according to the transmission phase relation reported in [57]: (7) where εr and λ are the dielectric constant and wavelength, respectively.…”

“…The metamaterial sensors can be fabricated with conventional photolithography [5], basic chemical etching [29], and ultra-short laser machining technique [15]. Moreover, the spin coating technique followed by femtosecond laser writing can be utilized for metamaterial fabrication [30], and surface micromachining process [31].…”

“…Moreover, the spin coating technique followed by femtosecond laser writing can be utilized for metamaterial fabrication [30], and surface micromachining process [31]. Furthermore, the metallic patches can be thermally deposited on the dielectric layer using chemical vapor deposition (CVD) technique [29].…”

A bifunctional metamaterial with broadband properties of absorption and linear-to-linear polarization conversion

“…In the last few years, the majority of research on metamaterials has focused on achieving a single function. For example, Wang et al [14] innovatively crafted a metamaterial using indium antimonide temperature-sensitive material. Their research revealed it to be a game-changing narrowband absorber, exhibiting both polarization insensitivity and broad-angle absorption.…”