期刊
NANO LETTERS
卷 16, 期 11, 页码 7025-7029出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b03210
关键词
Tunable metasurface; three-dimensional nanosplit-ring resonator; broad band switching; multidirecitional rotation; focused ion beam
类别
资金
- Research Project of Advanced Fabrication Technology of China
- Research Fund for the Doctoral Program of Higher Education [20130001110007]
- National Natural Science Foundation of China [50775001]
- National Basic Research Program of China (973 Program) [2015CB352100]
We introduce an electromechanically tunable metasurface composed of an array of three-dimensional nanosplit-rings for reversible and large-range changes of optical characteristics in infrared (IR) regime. When a current is induced or withdrawn, each nanosplit ring in the surface can deform in multi directions and consequently become a closed (OFF) or an open (ON) state. Theoretical and experimental results manifest that, as the metasurface is dynamically manipulated between the ON and OFF states, the corresponding resonance absorption will reversibly switch between the long wave (around 10.4 mu m) and midwave (around 6.3 mu m) IR regimes, two key IR spectral windows, and the reversible relative reflection changes can reach up to 95%.
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