According to the US “Sing Tao Daily†report, the team of academician of the National Academic of Engineering and Professor Zhang Xiang of Berkeley’s enlarged professor made great achievements in the nano-overlay materials after the 2008 invisible cloak of research results. A more challenging stealth blanket was developed to make the object undetectable over the entire visible spectrum. The study has been published in the latest issue of Nano Letters, the world's first invisible device operating at visible light frequencies.
The magical stealth carpet is a new optical magic research. The invisible blanket itself looks like a smooth optical mirror. The object is placed under the invisible blanket. The object and the object create unevenness under the invisible blanket. The invisible blanket produces a beam distribution curve that looks like light from a A flat, invisible blanket with nothing underneath is exactly the same when it is reflected, thus completely concealing an object. This is the latest research result of Zhang Xiang team.
The key to this achievement is the development of metamaterials because the materials used to make invisible blankets do not exist in nature. In order to guide the visible light around the hidden object, the light must arrive at the invisible blanket at different speeds. Each stealth carpet is specially designed for items that need to be concealed, and different nanoporous silica substrates are designed according to different sizes.
Therefore, the team of Zhang Xiang designed the material to have a designable refractive index, and guided a silicon nitride to a nanoporous silicon oxide substrate with a low refractive index. The shape of the hole was based on the invisible object. Specially designed to achieve a specific waveguide refractive index profile (cloaking refractive index profile).
This research is still in the laboratory stage. The stealth carpet is about 300 nanometers high and 6 micrometers wide. Due to the synthesis and cost of the material, it cannot be expanded to cover the area of ​​the human body. Its great significance lies in its great significance in the study of optical illusion schemes in addition to its application prospects in the military and civilian fields. The family of deformed optical principle devices will have great development in the future.
Unlike stealth carpets, which can be used at visible light frequencies, in 2008, the camouflage material developed by the team of Zhang Xiang uses metallic metamaterials to hide at microwave frequencies and hide objects in a frequency range that the human eye cannot detect. Inside.
People can see objects because they block light waves. If there is a material with a negative refractive index covering the surface of the object, and the light that can be blocked by the object bends and "turns", then the light does not appear to be blocked. From the viewer's point of view, the object seems to have disappeared and it has also become visually invisible. The study was included in Time magazine's top ten scientific findings in 2008.
The magical stealth carpet is a new optical magic research. The invisible blanket itself looks like a smooth optical mirror. The object is placed under the invisible blanket. The object and the object create unevenness under the invisible blanket. The invisible blanket produces a beam distribution curve that looks like light from a A flat, invisible blanket with nothing underneath is exactly the same when it is reflected, thus completely concealing an object. This is the latest research result of Zhang Xiang team.
The key to this achievement is the development of metamaterials because the materials used to make invisible blankets do not exist in nature. In order to guide the visible light around the hidden object, the light must arrive at the invisible blanket at different speeds. Each stealth carpet is specially designed for items that need to be concealed, and different nanoporous silica substrates are designed according to different sizes.
Therefore, the team of Zhang Xiang designed the material to have a designable refractive index, and guided a silicon nitride to a nanoporous silicon oxide substrate with a low refractive index. The shape of the hole was based on the invisible object. Specially designed to achieve a specific waveguide refractive index profile (cloaking refractive index profile).
This research is still in the laboratory stage. The stealth carpet is about 300 nanometers high and 6 micrometers wide. Due to the synthesis and cost of the material, it cannot be expanded to cover the area of ​​the human body. Its great significance lies in its great significance in the study of optical illusion schemes in addition to its application prospects in the military and civilian fields. The family of deformed optical principle devices will have great development in the future.
Unlike stealth carpets, which can be used at visible light frequencies, in 2008, the camouflage material developed by the team of Zhang Xiang uses metallic metamaterials to hide at microwave frequencies and hide objects in a frequency range that the human eye cannot detect. Inside.
People can see objects because they block light waves. If there is a material with a negative refractive index covering the surface of the object, and the light that can be blocked by the object bends and "turns", then the light does not appear to be blocked. From the viewer's point of view, the object seems to have disappeared and it has also become visually invisible. The study was included in Time magazine's top ten scientific findings in 2008.
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