Design of Optical Metamaterial Mirror with Metallic Nanoparticles for Broadband Light Absorption in Graphene Optoelectronic Devices

摘要: A general metallic mirror (i.e., a flat surface) has been popular optical component that can contribute broadband light absorption to thin-film optoelectronic devices; nonetheless, such electric with reversal of reflection phase inevitably causes the problem minimized field near at surface (maximized one quarter wavelength from mirror). This becomes more elucidated, when deep-subwavelength-scaled two-dimensional (2D) material (e.g., graphene and molybdenum disulfide) is implemented into device as an active channel layer. The purpose this work was conceive idea for using charge storage layer (spherical Au nanoparticles (AuNPs), embedded dielectric matrix) floating-gate photodetector magnetic mirror, which allows harness increase in absorption. In particular, we systematically examined whether versatile assembly spherical AuNP monolayer within matrix metamaterial mirror), should be designed placed right below device, indeed treated effective mirror. addition being capable enhancement absorption, access various structural motifs AuNPs benefitting recent advances chemical synthesis promises compelling opportunities sophisticated engineering High amenability semiconductor-related procedures may make strategy widely applicable thin film devices. Our study thereby illustrates advantages advancing design rational light-matter interaction