The reporter learned from Zhejiang University on April 2 that Liu Ruopeng, a graduate of the school, and American scientists jointly developed an invisible cloak that can distort microwaves.
According to reports, the secret of the operation of this cloak is that it can bend the path of the microwave. If its design is perfect, the person wearing it or the buildings and industrial land it covers will be invisible, making it visually invisible.
The reason why people can see objects is because they block the passage of light waves. An optical researcher at the Institute of Physics of the Chinese Academy of Sciences told reporters that in theory, if light can be "turned", it is entirely possible to develop an "invisibility cloak".
As the first author of the project, Liu Ruopeng said that the most critical technology of this cloak is the design of materials. This cloak is actually made of thousands of tiny pieces of "special material" that can control light. The principle is that these "special material" pieces are specially arranged so that they "turn" the light waves. Under normal circumstances, as soon as the light hits the object, the light will bounce off the surface of the object and illuminate the naked eye to make the object visible. The deflection of light allows the viewer to see through the back of the object, thus making the object invisible.
This cloak, like a bath mat, can make microwaves bounce off the surface and shoot toward the mirror surface when covering the object. The cloak can "fool" light waves around an object like water flowing around pebbles.
Earlier, another doctoral student at Hong Kong University, Chen Hongsheng, had published a paper in the American Physics Top Academic Journal "Physical Review Letters", explaining the physical mechanism of the cloak for the first time. "It should be the electromagnetic wave" turn ", walk around the object, bypass the obstacle, so that the object can be" invisible. "Chen Hongsheng said.
At present, the research of stealth clothes is very hot abroad. Because this technology has a very good confidentiality effect, it is considered to be widely used in the military. For example, it is difficult to detect the presence of radar in aircraft and submarines.
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