Active digital spoof plasmonics.

Active digital spoof plasmonics.
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主动数字欺骗等离子体激元

DOI:
10.1093/nsr/nwz148
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发表时间:
2020-02
影响因子:
20.6
通讯作者:
Zhang LP
Zhang LP
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhang HC;Cui TJ;Luo Y;Zhang J;Xu J;He PH;Zhang LP

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数字编码和数字调制是现代信息科学的基础。数字技术与超材料的结合为电磁波的空间和时间控制提供了强大的方案。然而,这种技术迄今为止仅限于自由空间光的控制。其应用于等离子体形成亚波长场仍然是难以捉摸的。在这里,我们报告的设计和实验实现的可调共形等离子体元表面,这是能够数字编码和调制设计师的表面等离子体在深亚波长尺度。基于两个离散色散状态之间的动态切换,以受控的方式,我们实现了数字调制的振幅和相位的表面波与近100%的调制深度在一个单一的设备。我们的研究不仅为有源色散工程引入了一种新的方法,而且也是实现亚波长集成等离子体电路的重要一步。
Abstract Digital coding and digital modulation are the foundation of modern information science. The combination of digital technology with metamaterials provides a powerful scheme for spatial and temporal controls of electromagnetic waves. Such a technique, however, has thus far been limited to the control of free-space light. Its application to plasmonics to shape subwavelength fields still remains elusive. Here, we report the design and experimental realization of a tunable conformal plasmonic metasurface, which is capable of digitally coding and modulating designer surface plasmons at the deep-subwavelength scale. Based on dynamical switching between two discrete dispersion states in a controlled manner, we achieve digital modulations of both amplitude and phase of surface waves with nearly 100% modulation depth on a single device. Our study not only introduces a new approach for active dispersion engineering, but also constitutes an important step towards the realization of subwavelength integrated plasmonic circuits.
DOI: 10.1038/srep40441
发表时间: 2017-01-16
期刊: Scientific reports
影响因子: 4.6
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