【摘 要】
：
We propose an effective way to achieve an enhanced optical absorption surface of titanium alloy 7[Ti7]fabricated by a femtosecond[fs]laser assisted with airflow pressure.The effect of laser scanning speed and laser power on the surfaces\' morphology and
【机 构】
：
State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mecha
论文部分内容阅读
We propose an effective way to achieve an enhanced optical absorption surface of titanium alloy 7[Ti7]fabricated by a femtosecond[fs]laser assisted with airflow pressure.The effect of laser scanning speed and laser power on the surfaces\' morphology and average reflectivity was studied.In order to further reduce the surface\'s reflectivity,different airflow pressure was introduced during the fabrication of Ti7 by a fs laser.Furthermore,the average reflectivity of samples fab-ricated under different laser parameters assisted with airflow was presented.In addition,the high and low temperature tests of all samples were performed to test the stability performance of the hybrid micro/nanostructures in extreme envi-ronments.It is demonstrated that the airflow pressure has an important influence on the micro/nanostructures for light trapping,the average reflectivity of which could be as low as 2.31％ over a broad band of 250-2300 nm before high and low temperature tests,and the reflection for specific wavelengths can go below 1.5％.
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