The Design of a Multilayer and Planar Metamaterial with the Multi-Functions of a High-Absorptivity and Ultra-Broadband Absorber and a Narrowband Sensor

The aim of this study is to enhance the design a multilayer and planar metamaterial that serves multiple functions, including high efficiency ultra-broadband absorption, as well acting narrowband sensor. primary feature absorber its fully structure, which enables flexible utilization two distinct absorption functionalities: achieved through application MgF2 layer, implementation Cu layer. To conduct simulation analyses, COMSOL Multiphysics® software (version 6.0) was employed. initial innovation lies in fact upon irradiation normal incident light on side, material exhibited an exceptional average absorptivity 97.0% across range spanning from 410 approximately 2300 nm. Moreover, when same radiated demonstrated peak at precise wavelength 480 nm, accompanied by 95.66%. Notably, these results were obtained with added benefit angle insensitivity. Such characteristics arise due excitation diverse resonant modes facilitated localized surface plasmon resonance metal–insulator–metal Fabry–Perot cavity. second focuses demonstrating can serve effective anti-reflection enhancing absorber. third aims establish optimal metal choice. Even substituting other metals did not diminish absorber; it should be noted alternative might negatively impact