Department of Electrical and Computer Engineering, ‡Department of Physics and Astronomy, §Department of Chemistry, and ∥Laboratory for Nanophotonics, Rice University , Houston, Texas 77005, United States.
Nano Lett. 2017 Oct 11;17(10):6034-6039. doi: 10.1021/acs.nanolett.7b02350. Epub 2017 Sep 13.
Color pixels composed of plasmonic nanostructures provide a highly promising approach for new display technologies, capable of vivid, robust coloration and incorporating the use of low-cost plasmonic materials, such as aluminum. Here we report a plasmonic device that can be tuned continuously across the entire visible spectrum, based on integrating a square array of aluminum nanostructures into an elastomeric substrate. By stretching the substrate in either of its two dimensions, the period and therefore the scattering color can be modified to the blue or the red of the at-rest structure, spanning the entire visible spectrum. The unique two-dimensional design of this structure enables active mechanical color tuning, under gentle elastic modulation with no more than 35% strain. We also demonstrate active image switching with this structure. This design strategy has the potential to open the door for next-generation flexible photonic devices for a wide variety of visible-light applications.
由等离子体纳米结构组成的彩色像素为新型显示技术提供了极具前景的方法，这种技术能够实现生动、稳定的色彩，并且可以使用成本低廉的等离子体材料，如铝。在此，我们报告了一种基于将正方形铝纳米结构阵列集成到弹性衬底上的等离子体器件，它可以在整个可见光谱范围内连续调谐。通过在衬底的两个维度中的任一个方向上拉伸，周期并且因此散射颜色可以被修改为静止结构的蓝色或红色，从而覆盖整个可见光谱。这种结构的独特二维设计使在不超过 35%应变的温和弹性调制下能够进行主动机械色彩调节。我们还通过这种结构演示了主动图像切换。这种设计策略有可能为各种可见光应用的下一代柔性光子器件开辟道路。
