MXene nanorods-based metasurface wideband absorber for infrared regime

This paper presents a wideband MXene-based metamaterial absorber made of subwavelength-sized periodic nanorods of MXene operating in the infrared regime. The top metasurface structure comprises a simple design and is made of a thin layer of MXene that features high tunability and high absorption characteristics. It is noticed that the proposed absorber shows absorption of above 80% over a wide range, from 1150 to 2500 nm. This significant absorption results due to localized surface plasmonic resonance (LSPR) of the top metasurface of periodic nanorods. The designed MXene-based optical absorber features a polarization-insensitive nature and demonstrates almost the same absorption over the wider portion of the spectrum for both transverse electric (TE) mode and transverse magnetic (TM) mode. Moreover, the proposed absorber shows a stable absorption for the obliquity incident angles up to 50°. The simulation results of the proposed absorber are verified using the Fabry-Parrot interference theory, and both results show a good agreement. The given absorber shows potential for various exciting applications, such as solar cells, sensors, and infrared imaging.