New metalens (IMAGE)

City University of Hong Kong

New metalens — Caption

The new metalens converts 394nm ultraviolet light (blue) into 197nm “vacuum UV” (pink) and focuses the VUV output on a small spot less than 2 micro-meter in diameter. Tiny triangular nano-resonators in precisely configured concentric circles on a microscopic disk of zinc oxide (ZnO). Several scanning electron microscopic (SEM) images of the meta-lens are shown (bottom right). Well-defined nano triangles with regularly varying rotation angles can be observed in the SEM images.

Credit

Prof Tsai Din-ping / DOI number: 10.1126/sciadv.abn5644

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