AI Article Synopsis
- A new method using femtosecond laser self-deposition has been developed to create micropillars on aluminum surfaces, allowing for adjustable infrared emissivity.
- This single-step process can control the size and distribution of the micropillars, affecting the infrared emissivity levels significantly.
- By manipulating the pulse-repetition frequency (PRF) of the laser, the surface can achieve low to high emissivity values and dual-band emissivity in specific infrared ranges.
Article Abstract
A metal surface with controllable infrared emissivity has a wide range of applications. However, a flexible and simple fabrication method is needed. Here, a controllable femtosecond laser self-deposition technology was developed to fabricate Al@AlOx core/shell micropillars (MPs) with diverse size distribution on the aluminum surface in a single-step operation under ambient conditions. By establishing a deterministic relationship between pulse-repetition frequency (PRF) and particle size distribution (PSD), we achieved continuous control of the infrared emissivity of the surface by lower PRF, ranging from low (0.31) to high (0.93). Additionally, by using higher PRF, we attained dual-band emissivity control, featuring high emissivity in the range of 10-14 µm and near-continuous change in the range of 2.5-10 µm.
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| http://dx.doi.org/10.1364/OL.533782 | DOI Listing |
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