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29 March 2024
 
  » arxiv » 2010.01254

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High-Temperature Ultra-Broad UV-MIR High-Efficiency Absorber Based on Double Ring-Shaped Titanium Nitride Resonators
Shun Cao ; Yi Jin ; Hongguang Dong ; Tingbiao Guo ; Zhenchao Liu ; Jinlong He ; Sailing He ;
Date 3 Oct 2020
AbstractAn ultrabroad absorber based on double-ring-shaped titanium nitride (TiN) nanoresonators, which can work in high temperatures, is proposed and numerically studied. The absorber with some optimal parameters exhibits an averaged absorption of 94.6% in the range of 200 - 4000 nm (from ultraviolet to mid-infrared) and a band from 200 - 3518 nm having an absorption > 90%. We have demonstrated in detail the physical mechanisms of the ultra-broad absorption, including the dielectric lossy property of TiN material itself in shorter wavelengths and plasmonic resonances caused by the metallic property of TiN nano-resonators in longer wavelengths. In addition, the absorber shows polarization independent and wide-angle acceptance. Another absorber with double TiN nano-rings of different heights has flatter and higher absorption efficiency (more than 95% absorption) at 200-2860 nm waveband. These properties make the proposed absorbers based on TiN has great potentials in many applications, such as light trapping, photovoltaics, thermal emitters.
Source arXiv, 2010.01254
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