Nov. 2, 2013
On Oct.31, the research team of Zhejiang University led by Professor Chen Hongsheng is demonstrating the effect of "Invisible Cloak”. A pencil is placed in it and the middle part of the pencil “disappeared”, while the background pattern remains clear and visible.
To make a perfectly “invisible cloak” is a dream of many scientists, engineers and technology enthusiasts. The research team of Zhejiang University led by Professor Chen Hongsheng is engaged in the electromagnetic “Invisible Cloak” mechanism and experimental research. They believe that, although there are still some technical limitations, electromagnetic invisibility technology will be the major opportunity to enter real life.
Electromagnetic waves (including light) will be scattered when irradiating to objects; the receiving of scattered waves indicates the existing of objects. If the direction of waves could be “turned”, the objects thus would be invisible. The conducted research in Professor Chen’s team is based on this concept.
The research team put forward a design idea of a visible light polygon “Invisible Cloak”, which can achieve invisibility effect in all directions in theory. In the experiment, they developed a hexagonal columnar “Invisible Cloak” whose frequency bands cover the entire optical band. In addition, the team also developed a microwave band cylinder device.
A pencil is placed in it and the middle part of the pencil “disappeared”, while the background pattern remains clear and visible.
The study led by Professor Chen’s team has not only played a catalytic role for the “Invisible Cloak” to reach a practical level, but also effectively reduced the complexity of its implementation.
