21:I[432972,["/_next/static/chunks/bb923814e1f4d2e9.js","/_next/static/chunks/dd3ee9f5b7716ca6.js","/_next/static/chunks/4204a0ae82542ca8.js","/_next/static/chunks/1270dead247da766.js","/_next/static/chunks/6e1aa89a642f40be.js","/_next/static/chunks/2d7aa753e81324a8.js","/_next/static/chunks/8ffd0b71567920d8.js","/_next/static/chunks/67ea6dfd21f16c5f.js","/_next/static/chunks/24eb4379f68013fd.js","/_next/static/chunks/b8cd775ffdf935bd.js","/_next/static/chunks/983103cd9eb7b428.js","/_next/static/chunks/263f2cdcb9aa2341.js","/_next/static/chunks/294b9525248c8e5f.js"],"default"] 22:T4c6,Tunable structural colors have diverse applications ranging from displays and photovoltaics to surface decoration and art. A metal–insulator–metal (MIM) cavity structure formed by thin continuous layers has drawn great interest as a lithography-free and scalable optical structure to control light transmission and reflection at the surface of a material. However, the production of distinct reflection colors from the structure is challenging because the typical MIM cavity absorbs a narrow wavelength range and reflects the rest of the spectrum. This study shows that the MIM structure can exhibit a reflection peak instead of a reflection dip if the metal layer has proper optical constants. Vivid reflection colors are generated by using thermally evaporated Au and Ag thin films whose refractive indices are much different from the standard handbook data. The strong thickness dependence of the refractive indices also enables color tuning by varying the thickness of the metal layer only. Consequently, color images can be printed by locally controlling the thickness of either the insulating spacer or the metal layer. The results of the study are attractive and useful for both practical and artistic purposes.23:T53f,A thin film cavity formed by stacking metal-insulator-metal (MIM) continuous layers is of significant interest as a lithography-free and scalable color-filtering structure. Such a cavity can selectively transmit a certain frequency range of incident light, thus producing vivid transmission colors. However, the generation of reflection colors with high purity and reflectivity is a challenge because a cavity in reflection mode resonantly absorbs a narrow range of wavelengths and reflects the remaining spectrum. This study shows that highly pure and reflective colors can be obtained by embedding an ultrathin Ge₂Sb₂Te₅ layer within the cavity. Because the MIM structure exhibits a nonuniform intensity distribution across the insulator layer, the approach is to place the Ge₂Sb₂Te₅ layer in a high-intensity region within the insulator and thereby create another absorption band in addition to the cavity resonance mode. When combined with the refractive-index engineering of the metal layer, this approach leads to red, green, and blue colors having a bandwidth of ∼100 nm and a reflection efficiency of 90%. The results of the study may be effectively utilized in numerous applications, including reflective color filters, colorimetric sensors, and surface decorations.24:T4d9,Abstract The aesthetic functions of metals have attracted increasing attention, and their colorization is of scientific and technological significance. This study demonstrates that vivid structural colors can be produced on stainless steel and Al, which are two of the most commonly used metals. It is well known that a transparent dielectric film coated onto a substrate exhibits a rippled spectrum consisting of alternating reflectance minima and maxima due to multibeam interference, making it appear colored. However, such a film does not produce strong colors on a highly reflective metallic substrate, because the resulting interference ripple has small amplitudes. Herein, very vivid colors are generated by coating a thin metal layer over a dielectric film, where the metal layer adjusts the amount of light incident into the dielectric and strengthens the interference effect. The hue and saturation of the produce

#	Concept	H-Index	Publications	Citations
1	Engineering	2	2	94
2	Applied Physics	2	2	94
3	Materials Science	2	2	94
4	Metamaterials	1	1	63
5	Nanophotonics	1	1	63

	Year	Citations

About

Top Concepts