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 ∼63,500 dpi while withstanding a high temperature (900 °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.

中文翻译：

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难熔等离子体晶体实现全色生成

等离子结构颜色，其中通过由常见等离子材料（如贵金属）制成的共振纳米结构产生鲜艳的颜色，已经激发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，能够承受超高温而不损坏的等离子体颜色仍然是一个尚未解决的挑战。在这里，我们报告了难熔的氮化铪 (HfN) 等离子体晶体，该晶体可以产生全可见颜色，具有约 63,500 dpi 的高图像分辨率，同时能够承受高温（900°C）。反射可见光的等离子体颜色可归因于等离子体 HfN 的独特特征，即 3.1 eV 的高体等离子体频率，可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以在宽广的色域中生成从蓝色到红色的颜色。新颖的耐火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。