Ultra-Broadband, Polarization-Irrelevant Near-Perfect Absorber Based on Composite Structure

Ultra-Broadband, Polarization-Irrelevant Near-Perfect Absorber Based on Composite Structure

Blog Article

This paper proposes a near-perfect absorption device based on a cross-shaped titanium nanostructure and a multilayered structure.The multilayered bottom structure consists Extra Handsets of alternately SiO2 and Ti.The whole device is put on a TiN substrate.The coupling between cross-shaped titanium nanostructures, and that between the cross-shaped titanium nanostructure and bottom multilayer, can further enhance the absorption at some wavelength where most of the energy is reflected or passes through in the device with a single structure.

According to the simulation results, the device presents a nearly perfect absorption in a wavelength range from 300 nm to 2000 nm.The average absorptance in Socks the wavelength range from 500 nm to 1400 nm exceeds 96%.This paper also provides a new idea for realizing perfect absorption, which is extensively used in sensing, controllable thermal emission, solar energy harvesting solar thermo-photovoltaic devices, and optoelectronic metrology.