Structural colors have always attracted much attention due to important applications in display devices,imaging security certification,optical data storage,and so on.The brightness of structure colors,as the carrier o...Structural colors have always attracted much attention due to important applications in display devices,imaging security certification,optical data storage,and so on.The brightness of structure colors,as the carrier of chiaroscuro information,is the key to making images appear stronger in the spatial and three-dimensional sense.However,relatively little work has been done on the control of the color brightness,and the reported structures are complex and difficult to fabricate.Here,we demonstrate a low-aspect-ratio anisotropic metasurface consisting of a PMMA film patterned by arrays of elliptical-shaped holes clamped by two thin aluminum films.By utilizing localized surface plasmon resonances,we realize a three-dimensional(3D)HSB(hue,saturation,and brightness)structure color with independent brightness control and enhance the cross-polarization reflection,covering approximately 120%of the s RGB color gamut.It is shown that the ratio of the major and minor axes leads to the independent control of brightness of the structural colors.The nanoprinting of HSB images with smooth brightness transitions is demonstrated through elaborate design of the metasurface geometry parameters and CMOScompatible micro-nano fabrication process.Our findings will facilitate the broad range of 3D nanoprinting and modern advanced display applications.展开更多
基金National Key Research and Development Program of China(2024YFA1209104)National Natural Science Foundation of China(12374282,61875225)。
文摘Structural colors have always attracted much attention due to important applications in display devices,imaging security certification,optical data storage,and so on.The brightness of structure colors,as the carrier of chiaroscuro information,is the key to making images appear stronger in the spatial and three-dimensional sense.However,relatively little work has been done on the control of the color brightness,and the reported structures are complex and difficult to fabricate.Here,we demonstrate a low-aspect-ratio anisotropic metasurface consisting of a PMMA film patterned by arrays of elliptical-shaped holes clamped by two thin aluminum films.By utilizing localized surface plasmon resonances,we realize a three-dimensional(3D)HSB(hue,saturation,and brightness)structure color with independent brightness control and enhance the cross-polarization reflection,covering approximately 120%of the s RGB color gamut.It is shown that the ratio of the major and minor axes leads to the independent control of brightness of the structural colors.The nanoprinting of HSB images with smooth brightness transitions is demonstrated through elaborate design of the metasurface geometry parameters and CMOScompatible micro-nano fabrication process.Our findings will facilitate the broad range of 3D nanoprinting and modern advanced display applications.
