Color Rendering Plasmonic Aluminum Substrates with Angular Symmetry Breaking
Color Rendering Plasmonic Aluminum Substrates with Angular Symmetry Breaking
复制标题
DOI：
10.1021/acsnano.5b05710
复制
发表时间：
2015-12-01
期刊：
影响因子：
17.1
通讯作者：
Novotny, Lukas
中科院分区：
文献类型：
--
作者：
Duempelmann, Luc;Casari, Daniele;Novotny, Lukas
我们制造并表征了大面积等离子体基板，其特征是由铝制成的不对称周期性纳米结构。局域和传播等离子体共振之间的强耦合导致具有可调谐光谱位置和宽度的特征法诺线形状。通过调整系统参数，如周期和铝结构的长度，可以产生跨越整个可见光谱的独特颜色。此外，铝结构的不对称产生了强烈的对称破色效果，只能从表面法线的一侧观察到颜色。利用浸没式激光干涉光刻和纳米压印光刻的结合，我们的显色结构可以在许多英寸大小的区域上制造。我们预见在防伪、光电、传感、显示和光学安全方面的应用。
We fabricate and characterize large-area plasmonic substrates that feature asymmetric periodic nanostructures made of aluminum. Strong coupling between localized and propagating plasmon resonances leads to characteristic Fano line shapes with tunable spectral positions and widths. Distinctive colors spanning the entire visible spectrum are generated by tuning the system parameters, such as the period and the length of the aluminum structures. Moreover, the asymmetry of the aluminum structures gives rise to a strong symmetry broken color rendering effect, for which colors are observed only from one side of the surface normal. Using a combination of immersed laser interference lithography and nanoimprint lithography, our color rendering structures can be fabricated on areas many inches in size. We foresee applications in anticounterfeiting, photovoltaics, sensing, displays, and optical security.