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Multi spot focusing by using composite spiral zone plates

上传者: 2021-02-22 15:04:41上传 PDF文件 1.64MB 热度 8次
We present a flexible, simple, and cost effective approach for generating high-quality multiple focal spots in the far field using composite spiral zone plates (SZPs), which serve as a synthesis of two SZPs with different topological charges. By changing the topological charges of the SZPs can obtai
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