Journal
MICROMACHINES
Volume 12, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/mi12111406
Keywords
femtosecond laser; aluminum alloy; antireflection; surface micro/nanostructure
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Funding
- Shanghai Sailing Program [19YF1420100]
- Fundamental Research Funds for the Central Universities [2020kfyXJJS085]
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By designing micro-nano structures on the surface of aluminum alloy and employing a two-step strategy, broadband antireflection structures with excellent light trapping properties were fabricated, suitable for applications in thermal photovoltaics and other fields.
Designed micro-nano structures on the surface of aluminum alloy provide excellent light trapping properties that can be used extensively in thermal photovoltaics, sensors, etc. However, the fabrication of high-performance antireflective micro-nano structures on aluminum alloy is challenging because aluminum has shallow intrinsic losses and weak absorption. A two-step strategy is proposed for fabricating broadband antireflection structures by superimposing nanostructures onto microscale structures. By optimizing the processing parameters of femtosecond laser, the average reflectances of 2.6% within the visible spectral region (400-800 nm) and 5.14% within the Vis-NIR spectral region (400-2500 nm) are obtained.
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