Full-color generation enabled by refractory plasmonic crystals
Full-color generation enabled by refractory plasmonic crystals
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DOI：
10.1515/nanoph-2022-0071
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发表时间：
2022-05-06
期刊：
影响因子：
7.5
通讯作者：
Lu, Yu-Jung
中科院分区：
文献类型：
--
作者：
Chiao, Zong-Yi;Chen, Yu-Chia;Lu, Yu-Jung
等离子体结构颜色，通过普通等离子体材料（如贵金属）制成的共振纳米结构产生鲜艳的颜色，引起了全世界对无背光显示器的兴趣。然而，由于贵金属的低熔点，等离子体颜色能够承受超高温而不受损害仍然是一个未解决的挑战。在这里，我们报告了耐火的氮化铪（HfN）等离子体晶体，它可以产生全可见的颜色，具有类似于63,500 dpi的高图像分辨率，同时承受高温（900摄氏度）。反射可见光的等离子体颜色可归因于等离子体高频共振（HfN）的独特特性，它具有3.1 eV的高体等离子体频率，可以支持可见光范围内的局部表面等离子体共振（LSPR）。通过调整LSPR的波长，可以控制反射光学响应，从而产生从蓝到红的宽色域颜色。新型难熔等离子体颜色为从反射显示器到太阳能收集系统的新兴应用铺平了道路。
Plasmonic structural color, in which vivid colors are generated via resonant nanostructures made of common plasmonic materials, such as noble metals have fueled worldwide interest in backlight-free displays. However, plasmonic colors that were withstanding ultrahigh temperatures without damage remain an unmet challenge due to the low melting point of noble metals. Here, we report the refractory hafnium nitride (HfN) plasmonic crystals that can generate full-visible color with a high image resolution of similar to 63,500 dpi while withstanding a high temperature (900 degrees C). Plasmonic colors that reflect visible light could be attributed to the unique features in plasmonic HfN, a high bulk plasmon frequency of 3.1 eV, whichcould support localized surface plasmon resonance (LSPR) in the visible range. By tuning the wavelength of the LSPR, the reflective optical response can be controlled to generate the colors from blue to red across a wide gamut. The novel refractory plasmonic colors pave the way for emerging applications ranging from reflective displays to solar energy harvesting systems.