Damage analysis of a perfect broadband absorber by a femtosecond laser
Date
2019
Authors
Haque, Ahasanul
Morshed, Monir
Li, Ziyuan
Li, Li
Vora, Kaushal
Xu, Lei
Fu, Lan
Miroshnichenko, Andrey
Hattori, Haroldo
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Nature Publishing Group
Abstract
Plasmonic metamaterial absorbers are particularly important in different applications such as photodetectors, microbolometers and solar cells. In this paper, we propose a tungsten boride (WB, a refractory ceramic) based broadband metamaterial absorber whose optical properties is numerically analyzed and experimentally characterized. We have also analyzed the damage characteristics of this absorber using a femtosecond laser and compared with an ordinary Au metamaterial absorber. We observe that WB has almost the double absorption bandwidth with absorption more than 90% over the spectral range of 950 to 1400 nm when compared with the Au counterpart. Furthermore, we show that Au metamaterial is damaged at the power of around 36.4 mW whereas WB metamaterial is not damaged at that power (WB has high Tammann temperature than Au)-however the atom of WB material was knocked off by the bombardment of a femtosecond laser.
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Scientific Reports
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Journal article
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Open Access
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Creative Commons Attribution 4.0 International License
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