Friday, 20 January 2017
Metamaterials are materials that do not exist in nature. Their heterogeneous structure makes it possible to change the direction and properties of electromagnetic waves and to control the properties of light. For example, it is possible to make various objects invisible, inside a certain range of the electromagnetic spectrum, with the help of metamaterials.
The most significant practical applications of metamaterials may include new inventions for various industries, as well as super-powerful computers whose electrical signals give way to photonic signals.
Earlier, the research team of the Superconducting Metamaterials Laboratory at the National University of Science and Technology MISIS developed a unique metamaterial with extremely high anapole quality factors, a phenomenon caused by the special configuration of electromagnetic fields.
The anapole is a source whose electromagnetic fields are confined inside itself and are not emitted into adjacent space. The quality factor is a value describing the quality of an oscillating system. Increased quality factors serve to reduce energy losses inside a system during one oscillation.
NUST MISIS experts have managed to achieve quite impressive results with a substantial quality factor, while experimenting with the new metamaterial, he said.
“This result leads to very interesting consequences. For example, our metamaterial can serve as a basis for extremely sensitive sensors. It can ‘sense’ the presence of even miniscule amounts of various substances, including explosives. It will be possible to ‘see’ that a certain person had touched hexogen a week ago,” the scientist noted.
The new metamaterial will also help make various types of equipment “invisible” using stealth technology.
“The anapole, which does not emit electromagnetic fields, can emit electromagnetic potentials. This creates a unique opportunity for concealing various objects, for shielding them from electromagnetic fields and for developing concealed data transmission systems only through the modulation of the vector potential. Moreover, this may imply that we are simply unable to see numerous objects in nature because they interact with potentials alone, rather than electromagnetic fields,” the scientist explained.
According to Basharin, NUST MISIS experts are already searching for methods to experimentally examine this possibility with the help of their new metamaterial.
If successful, the above-mentioned metamaterial could be used as the so-called qubits, the main building blocks of quantum computers whose elements interact with the help of potentials, rather than fields.
Source by: Internet