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22 August 2020 Visible plasmonic perfect absorber based on titanium nitride metamaterial
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Abstract
We theoretically calculated a metamaterial perfect absorber that exhibits broadband perfect absorption in the visible region using TiN nanostructures as resonator. We designed a 200 nm diameter TiN nanodisks array covered with a 5 nm thick TiO2 film. We used the FDTD method to obtain numerical values for reflectance, transmittance, and absorptance. By optimizing the structure design, we found that the average absorption with the TiN nanoresonators is 97% in the wavelength range from 350 nm to 750 nm. The calculated electric field distribution indicates a strong localized optical field around the TiN nanodisk which enhanced the light absorption.
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© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tomoki Watanabe, Meng-Ju Yu, Hao-Yu Lan, Masanobu Haraguchi, and Yu-Jung Lu "Visible plasmonic perfect absorber based on titanium nitride metamaterial", Proc. SPIE 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII, 114622D (22 August 2020); https://doi.org/10.1117/12.2568276
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