The researchers team developed a three-dimensional antilac, which is capable of practically completely absorbing one specific type of arbitrary waves.
The laser is an ideal source of light generating waves clearly defined color. However, it is also possible to create an opposite device that perfectly absorbs specific waves and almost completely dispels their energy. A team of scientists from the Vienna Technical University together with colleagues from Nice has developed a method for using this effect in very complex systems in which light waves randomly spread in arbitrary directions.
With the help of mathematical calculations and computer modeling, physics proved that you can create an ideal absorber, which, depending on the internal structure, will interact with certain waves, without allowing them to «elude». So far, such antislauses have been implemented only in one-dimensional structures that radiation went from opposite sides. However, the Austrians showed that multidimensional complex structures may have similar properties.
The laboratory arbitrary antilazer consists of a microwave chamber with a central absorbing antenna, surrounded by teflon cylinders, located randomly. These cylinders reflect and deflect the waves like stones in a puddle with them, forming a complex system. Directing radiation and measuring dispersion, they define the internal structure of each object. This allows you to calculate the wave, which «absorbs» the central antenna. The developed technique allows to achieve an absorption of an incoming 99.8% signal.
The effect is due to the fact that the incident wave is split into a set of parts that interfere with each other, and as a result they cannot exit.
The technology is in an early stage of development, but can potentially be applied in all technical disciplines associated with wave phenomena. For example, mobile communications or medicine.
Previously, we reported that physicists discovered