Metamaterials or what opportunities await us in the future.

Yes, the pace of development of technologies is known to all, so it becomes possible to translate the theory of past years into reality. If earlier, some statements could make society laugh, as Pythagoras once did not believe that the Earth is round, so at the beginning of the 20th century, evidence of the possibility of a negative refractive index did not convince scientists.
Really, how?
And after several decades, when for the first time it turned out to achieve a negative refractive index, the theory emerged again and in a different direction.

Actually, what I would like to talk about is based on the theory of metamaterials.

Metamaterial is an artificial substance that can interact with electromagnetic waves in such a way that natural materials cannot. The prefix "meta" in this case emphasizes that these composite materials as a whole have electromagnetic properties that are not inherent in any of the constituent elements.

Metamaterials have a negative refractive index. This effect is achieved by simultaneously changing the dielectric and magnetic permeability of the substance, the main field characteristics describing the propagation of electromagnetic waves in the medium. So, when a ray of light passes from one medium to another, the refracted ray will fall not into the “right” medium, but into the “left” relative to the perpendicular drawn from the point of incidence of the ray.

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In environments with a negative refractive index, the reversed doppler effect and the Vavilov-Cherenkov effect will be observed, i.e. phase velocity reversal occurs .

In the first case, the source of light (radiation) is to the left of the video.


In the second case - on the right


Also, the optical properties of the diffusing and collective lenses vary relative to each other, due to the negative refractive index.

What does all this give:

Astronomy and Radiophysics : coverings from metamaterials work perfectly to protect objects from sensors or telescopes that use longwave radiation, and not visible light.
Optics: no diffraction limit for lenses needs no comment.
Microelectronics: the emergence of smaller and at the same time more efficient antennas and devices for cell phones, the expansion of data storage density on disks and more complex electronic circuits.
Development of more powerful lasers: the development of more powerful lasers, which at the same pumping energy will produce a more powerful and destructive light pulse by several orders of magnitude.
New anti-glare materials;
And what is most interesting , the development and implementation of this theory will allow in a certain frequency range to hide objects from radar / sensor.
Now this is achieved in the terahertz frequency range. And tomorrow - you see, and in the "visible" work.