Wang Liang, Yan Yichao, Ji Xiangbo, Zhang Wanli, Jiang Hongchuan, Qin Wenzhi, Wang Yao, Tang Duo
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, China.
Nanoscale Res Lett. 2020 Jun 5;15(1):125. doi: 10.1186/s11671-020-03346-5.
Three kinds of Al flyer plates with different nanostructured absorption layers were in situ prepared by a direct laser writing technology to improve the energy conversion efficiency in a laser-driven flyer assembly. Microstructures, light absorption, and flyer velocity in the acceleration chamber were investigated. The reflectance for the flyers at 1064-nm wavelength can be reduced from 81.3 to 9.8% by the nanostructured absorption layer. The terminal velocity of a 50-μm-thick Al flyer irradiated by a 60-mJ laser pulse is 831 m/s, while the velocity of the flyer with an in situ-fabricated nano-absorption layer reaches up to 1113 m/s at the same condition. Resultantly, the energy conversion efficiency of the flyer with a nanostructure absorption layer can reach as high as 1.99 times that of the Al flyer. Therefore, the nanostructured absorption layer in situ prepared on the surface of a flyer provides a new method to significantly improve the energy conversion efficiency of a laser-driven flyer.
采用直接激光写入技术原位制备了三种具有不同纳米结构吸收层的铝飞片，以提高激光驱动飞片组件中的能量转换效率。研究了加速腔中的微观结构、光吸收和飞片速度。纳米结构吸收层可使飞片在1064nm波长处的反射率从81.3%降低至9.8%。用60mJ激光脉冲辐照50μm厚的铝飞片时，其终端速度为831m/s，而在相同条件下，具有原位制备的纳米吸收层的飞片速度可达1113m/s。结果表明，具有纳米结构吸收层的飞片的能量转换效率可达铝飞片的1.99倍。因此，在飞片表面原位制备的纳米结构吸收层为显著提高激光驱动飞片的能量转换效率提供了一种新方法。
