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Conductive polymer nanoantennas for dynamic organic plasmonics.
Nature Nanotechnology ( IF 38.1 ) Pub Date : 2019-12-09 , DOI: 10.1038/s41565-019-0583-y
Shangzhi Chen 1 , Evan S H Kang 1 , Mina Shiran Chaharsoughi 1 , Vallery Stanishev 2 , Philipp Kühne 2 , Hengda Sun 1 , Chuanfei Wang 1 , Mats Fahlman 1 , Simone Fabiano 1 , Vanya Darakchieva 2 , Magnus P Jonsson 1
Affiliation  

Being able to dynamically shape light at the nanoscale is one of the ultimate goals in nano-optics1. Resonant light-matter interaction can be achieved using conventional plasmonics based on metal nanostructures, but their tunability is highly limited due to a fixed permittivity2. Materials with switchable states and methods for dynamic control of light-matter interaction at the nanoscale are therefore desired. Here we show that nanodisks of a conductive polymer can support localized surface plasmon resonances in the near-infrared and function as dynamic nano-optical antennas, with their resonance behaviour tunable by chemical redox reactions. These plasmons originate from the mobile polaronic charge carriers of a poly(3,4-ethylenedioxythiophene:sulfate) (PEDOT:Sulf) polymer network. We demonstrate complete and reversible switching of the optical response of the nanoantennas by chemical tuning of their redox state, which modulates the material permittivity between plasmonic and dielectric regimes via non-volatile changes in the mobile charge carrier density. Further research may study different conductive polymers and nanostructures and explore their use in various applications, such as dynamic meta-optics and reflective displays.

中文翻译:

用于动态有机等离子体的导电聚合物纳米天线。

能够在纳米级动态整形光是纳米光学1的最终目标之一。使用基于金属纳米结构的常规等离激元可以实现共振的光-质相互作用,但是由于固定的介电常数2,其可调谐性受到很大限制。因此需要具有可切换状态的材料和用于动态控制纳米级光-物质相互作用的方法。在这里,我们表明导电聚合物的纳米盘可以支持近红外的局部表面等离子体共振,并可以用作动态纳米光学天线,其共振行为可通过化学氧化还原反应进行调节。这些等离子体激元源自聚(3,4-乙撑二氧噻吩:硫酸盐)(PEDOT:Sulf)聚合物网络的移动极化电子载体。我们演示了通过化学调节纳米天线的氧化还原态来完成对纳米天线光学响应的​​完全可逆的转换,通过移动电荷载流子密度的非易失性变化来调节等离激元和介电体系之间的材料介电常数。进一步的研究可能会研究不同的导电聚合物和纳米结构,并探索它们在各种应用中的用途,例如动态亚光学和反射显示器。
更新日期:2019-12-11
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