期刊
OPTICS EXPRESS
卷 25, 期 20, 页码 23873-23879出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.023873
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资金
- National Natural Science Foundation of China (NSFC) [61605088]
- Natural Science Foundation of Jiangsu Province [BK20150845, 15KJB140004]
- Grants-in-Aid for Scientific Research [16H03886] Funding Source: KAKEN
In this paper, few-layer porous graphene is integrated onto the surface of a metasurface layer to provide a uniform static electric field to efficiently control liquid crystal, thereby enabling flexible metamaterial designs. We demonstrate a tunable cross-shaped metamaterial absorber with different arm lengths driven by this combined metasurface and graphene electrode. The resulting absorber supports a resonant frequency tunable from 0.75 to 1 THz with a high-quality factor, and amplitude modulation of similar to 80% at these frequencies with an applied voltage of 10 V. Furthermore, the near-field intensity and hot spot distribution can be manipulated over a broad range. (C) 2017 Optical Society of America
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