|Abstract:The enhanced visible-near infrared light absorber has important application potentials in many fields such as photoelectric signal conversion, detection, communication, and sensing. In this paper, based on the principle of Gires-Tournois resonantor resonance absorption, an all-aluminum-based planar thin-film stacked metamaterial light wave absorber is proposed. The device is composed of a sub-wavelength Al/Al2O3/Al three-layer film structure. Through optimal selection of appropriate parameters, the absorption peak position is continuously adjustable from visible to near infrared, the absorption peak is close to 100%, and the variable angle reflection spectra show that the device is not sensitive to the incident angle. The theoretical calculation results are in perfect agreement with the experimental results. The absorber with a perfect absorption wavelength near 500 nm heats up rapidly under 532 nm laser irradiation, and the maximum temperature can reach 55.4°C, indicating potential applications in the field of photothermal conversion.