Self-assembled plasmonics for angle-independent structural color displays with actively addressed black states
Self-assembled plasmonics for angle-independent structural color displays with actively addressed black states
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DOI：
10.1073/pnas.2001435117
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发表时间：
2020-06-16
影响因子：
11.1
通讯作者：
Chanda, Debashis
中科院分区：
文献类型：
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作者：
Franklin, Daniel;He, Ziqian;Chanda, Debashis
纳米结构等离子体材料可以通过与基本上小的长度尺度的光相互作用而导致下一代显示器所需的极其紧凑的像素和滤色器。然而，先前的演示遭受严重的角度敏感性、缺乏饱和颜色和缺乏黑/灰状态和/或与主动寻址电子器件集成是不切实际的。在这里，我们报告了一个生动的自组装纳米结构系统，克服了这些挑战，通过多维杂交的等离子体共振。通过利用铝薄膜生长机制，在真空物理气相沉积过程中，在近场接近镜子的地方产生密集的颗粒阵列。相邻粒子和镜子之间的亚10 nm间隙导致局部等离子体激元模式的强多维耦合，导致具有可忽略的角色散的奇异共振，并且类似于在期望波长处的入射光的98%吸收。该工艺与任意结构的衬底兼容，并且可以生产晶圆级、扩散、角度无关和柔性等离子体材料。然后，我们展示了独特的能力，强耦合等离子体激元系统通过集成与主动寻址的反射式液晶显示器与黑色状态的控制。混合显示器易于编程以显示图像和视频。
Nanostructured plasmonic materials can lead to the extremely compact pixels and color filters needed for next-generation displays by interacting with light at fundamentally small length scales. However, previous demonstrations suffer from severe angle sensitivity, lack of saturated color, and absence of black/gray states and/or are impractical to integrate with actively addressed electronics. Here, we report a vivid self-assembled nanostructured system which overcomes these challenges via the multidimensional hybridization of plasmonic resonances. By exploiting the thin-film growth mechanisms of aluminum during ultrahigh vacuum physical vapor deposition, dense arrays of particles are created in near-field proximity to a mirror. The sub-10-nm gaps between adjacent particles and mirror lead to strong multidimensional coupling of localized plasmonic modes, resulting in a singular resonance with negligible angular dispersion and similar to 98% absorption of incident light at a desired wavelength. The process is compatible with arbitrarily structured substrates and can produce waferscale, diffusive, angle-independent, and flexible plasmonic materials. We then demonstrate the unique capabilities of the strongly coupled plasmonic system via integration with an actively addressed reflective liquid crystal display with control over black states. The hybrid display is readily programmed to display images and video.