Tunable Metasurface and Flat Optical Zoom Lens on a Stretchable Substrate

被引：570

作者：

Ee, Ho-Seok ^{[1
]}

Agarwal, Ritesh ^{[1
]}

机构：

[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

NANO LETTERS | 2016年 / 16卷 / 04期

关键词：

Metasurface; tunable metasurface; reconfigurable metasurface; flat optics; flat lens; flat zoom lens; BROAD-BAND; PLASMONIC METASURFACES; PHASE DISCONTINUITIES; LIGHT-PROPAGATION; VISIBLE-LIGHT; WAVE PLATE; HOLOGRAMS; SURFACE; NANOSTRUCTURE; EFFICIENCY;

D O I：

10.1021/acs.nanolett.6b00618

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A mechanically reconfigurable metasurface that can continuously tune the wavefront is demonstrated in the visible frequency range by changing the lattice constant of a complex Au nanorod array fabricated on a stretchable polydimethylsiloxane substrate. It is shown that the anomalous refraction angle of visible light at 632.8 nm interacting with the tunable metasurface can be adjusted from 11.4 degrees to 14.9 degrees by stretching the substrate by similar to 30%. An ultrathin flat 1.7X zoom lens whose focal length can continuously be changed from 150 to 250 mu m is realized, which also demonstrates the potential of utilizing metasurfaces for reconfigurable flat optics.

引用

页码：2818 / 2823

页数：6

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