期刊
ACS NANO
卷 14, 期 2, 页码 1418-1426出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b08228
关键词
stretchable photonics; color tuning metasurface; polarization independence; dynamic control
类别
资金
- National Key Research and Development Project [2018YFB2200403]
- National Natural Science Foundation of China [11974092, 61975041]
- Shenzhen Fundamental research projects [JCYJ20180507184613841]
- public platform for fabrication and detection of micro-and nanosized aerospace devices
- Shenzhen engineering laboratory on organic inorganic perovskite devices
Mechanical stretching has been an effective way to achieve widely tunable optical response in artificial nanostructures. However, the typical stretchable optical devices produce exactly the reverse effects for two orthogonal linear polarizations, significantly hindering their practical applications in many emerging systems. Herein, we demonstrate an approach for a mechanically tunable all-dielectric metasurface with polarization insensitivity and full-spectrum response in the visible range from 450 to 650 nm. By embedding a TiO2 metasurface in a polydimethylsiloxane substrate and stretching it in one direction, we find that the distinct reflection colors of two orthogonal linear polarizations can be tuned across the entire visible spectrum simultaneously. Encryption and display of information have also been realized with the same technique. The corresponding calculations show that the spectral responses of light with polarizations perpendicular and parallel to the strain are determined by two different mechanisms, that is, the near-field mutual interaction and the grating effects. This research shall shed light on stretchable and wearable photonics.
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