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Electrotunable nanoplasmonic liquid mirror
Nature Materials ( IF 41.2 ) Pub Date : 2017-09-11 , DOI: 10.1038/nmat4969
Yunuen Montelongo , Debabrata Sikdar , Ye Ma , Alastair J. S. McIntosh , Leonora Velleman , Anthony R. Kucernak , Joshua B. Edel , Alexei A. Kornyshev

Recently, there has been a drive to design and develop fully tunable metamaterials for applications ranging from new classes of sensors to superlenses among others. Although advances have been made, tuning and modulating the optical properties in real time remains a challenge. We report on the first realization of a reversible electrotunable liquid mirror based on voltage-controlled self-assembly/disassembly of 16 nm plasmonic nanoparticles at the interface between two immiscible electrolyte solutions. We show that optical properties such as reflectivity and spectral position of the absorption band can be varied in situ within ±0.5 V. This observed effect is in excellent agreement with theoretical calculations corresponding to the change in average interparticle spacing. This electrochemical fully tunable nanoplasmonic platform can be switched from a highly reflective ‘mirror’ to a transmissive ‘window’ and back again. This study opens a route towards realization of such platforms in future micro/nanoscale electrochemical cells, enabling the creation of tunable plasmonic metamaterials.



中文翻译:

电可调谐纳米等离子体液体镜

最近,人们开始设计和开发完全可调谐的超材料,以用于从新型传感器到超透镜等各种应用。尽管已经取得了进步,但是实时调节和调制光学性能仍然是一个挑战。我们报告了基于在两个不混溶的电解质溶液之间的界面处的16 nm等离子体纳米粒子的电压控制自组装/拆卸的可逆电可调液镜的首次实现。我们表明,光学特性(例如吸收带的反射率和光谱位置)可以在原位变化在±0.5 V之内。这种观察到的效果与对应于平均粒子间距变化的理论计算非常吻合。该电化学完全可调的纳米等离子体平台可以从高反射率的“镜”切换到透射性的“窗口”,然后再切换回去。这项研究为在未来的微米/纳米级电化学电池中实现此类平台开辟了道路,从而创造了可调谐的等离子超材料。

更新日期:2017-09-12
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