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Dual‐Wavelength Focusing through Fresnel Zone Plate Fabricated in Lithium Niobate Crystal by Femtosecond Laser Micromachining |
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| Authors: | Bing Zhu Xiangmin Liu Haigang Liu Yi'an Liu Xiongshuo Yan Yuping Chen Xianfeng Chen |
| Abstract: | |
| Keywords: | beam focusing femtosecond laser micromachining Fresnel zone plates lithium niobate |