Abstract:In this paper, we propose an Insulator-Metal-Insulator-Metal (IMIM) nano-block array structure, which can achieve tunable single-peak and double-peak perfect absorption properties from visible light to near-infrared. Compared with our previous work, this paper additionally points out that due to the coupling effect between SPPs, the original bule-shifted spectrum is converted into red-shifted during the process of changing the thickness ratio of the middle silver nano-block to the SiO2 nano-block. In the desig… Show more
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