Broadband metamaterial absorber based on plasmonic nanodisk array and its application in boosting the performance of photodetector

Abstract

In this work, we present the design and fabrication of the broadband metamaterial absorber (MA) based on plasmonic nanodisk arrays. The proposed MA structure exhibits a high average absorption of 96.68 % in simulation and 80 % in experiment, which covering the broadband spectrum range from visible to near-infrared (400 to 1000 nm). Furthermore, a plasmonic perovskite photodetector (PD) functionalized by the proposed plasmonic MA structure was fabricated to exploring its potential applications in boosting the performance of PD. The results demonstrate that the plasmonic PD achieves 3.5 times enhancement in the responsivity compared with the normal PD (without plasmonic MA structure). The reported broadband MA structure can be used as a universal plasmonic platform for a wide range of applications including PDs, solar cells and other optoelectronic devices.