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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 | Abstract: | An 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 | Services: | Forum | Review | PDF | Favorites |
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