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- DOI: 10.1364/OE.21.011628
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Rapid fabrication of surface micro/nano structures with enhanced broadband absorption on Cu by picosecond laser
P.X.Fan, M.L.Zhong, L. Li, T. Huang, H.J. Zhang
Optics Express. 2013;21(10):11628-11637.
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Full-text held externally
- DOI: 10.1364/OE.21.011628
Abstract
A surface micro/nano structuring technique was demonstrated by utilizing a picosecond laser beam to rapidly modify the optical property of copper surfaces with a scanning speed up to tens of millimeters per second. Three kinds of surface micro/nanostructures corresponding to three levels of reflectance were produced which are obviously different from those induced by a femtosecond or nanosecond laser. Specifically, a porous coral-like structure results in over 97% absorptivity in the visible spectral region and over 90% absorptivity in average in the UV, visible, and NIR regions (250 - 2500 nm). Potential applications may include solar energy absorbers, thermal radiation sources, and radiative heat transfer devices. (C) 2013 Optical Society of America
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