Broadband light absorption of an Al semishell-MIM nanostrucure in the UV to near-infrared regions

Abstract

A plasmonic broadband light absorber, whose absorption is insensitive to incident angles and polarizations, in the UV to near-infrared regions is demonstrated. In experimental observations, the maximum average absorption of 83% over a wavelength range from 300 to 1000 nm was confirmed. Our proposed plasmonic absorber is based on a three-layer stack of metal-insulator-metal, and the top metal layer is nanostructured by colloidal lithography. This structure is composed of Al, which is an excellent and cost-effective plasmonic material. This fabrication simplicity and economical material allows us to produce a large-scale device of solar absorbers.

Simulation of Mushroom Nanostructures with Ag Nanoparticles for Broadband and Wide-Angle Superabsorption

“…Many metamaterial absorbers have perfect absorption and are insensitive to the incident angle and polarization [17,18]. A typical metamaterial absorber is composed of a metal-dielectric multilayer film, which achieves broadband absorption through impedance matching and resonance [19][20][21]. Kim et al first introduced hyperuniform disordered patterns to a metal-insulator-metal gap plasmon metasurface, demonstrated enhanced wideband light absorption in the visible and near-infrared spectral region, and revealed the origins of the two resonance modes of the gap plasmon metasurface structure [22].…”

Synthesis and optical characterization of asymmetric multilayer metal–insulator nanocrescent in aqueous solutions

“…1,3) Moreover, the SPRs in MIM nanostructures can be achieved without utilizing any attenuated total reflectance system. Therefore, the MIM nanostructures have been used for a plenty of actual applications, such as optical filters, 4) optically bi-stable devices, 5) broadband light absorption, 6) and biosensors. 7) As compared to the nanostructures on flat substrates, a single-layer and multilayer nanostructures on spherical substrates exhibit higher flexibility in designing their structure and adjusting optical properties, hence it tends to receive more attention of scientists.…”