“Invisibility” was only seen in science fiction in the past, such as the invisibility cloak of “Harry Potter”. Now scientists from the University of Rostock and the Vienna University of Technology have developed a new process that can make artificial materials transparent or even according to needs. Completely invisible, and published in the prestigious journal Science Advances.
Stealth has a wide range of uses in espionage and military, but there are many more applications, and because of such great practicality, scientists and engineers have been actively researching and making considerable progress, using molybdenum trioxide, metamaterials, super Screens, dielectric constants to make invisibility cloaks, and it’s all about manipulating light in the right way, but also significantly enhancing sensors, telecommunications, encryption, and many other technologies.
A team of scientists from the University of Rostock has succeeded in developing a completely new method for designing man-made materials that can communicate through precise tuning of the emitted light without any distortion, and in close cooperation with partners at the Vienna University of Technology, it is possible to transmit light over kilometer-long distances. Reconstructing and observing the microscopic interactions of optical signals with newly developed active materials in fiber optic networks.
According to Alexander Szameit, a professor at the Institute of Physics at the University of Rostock, scattering occurs when light propagates in an inhomogeneous medium, an effect that rapidly transforms a compact directional beam into diffuse light, like clouds in summer and fog in autumn, where the material The microscopic density distribution of a particle determines the details of scattering, while the basic idea of inducing transparency is to use a little-known optical property to clear a path for the beam.
The second property is in the field of photonics, under the name of the mysterious “non-Hermitian”, describing the flow of energy, or describing the amplification and attenuation of light, especially the attenuation of absorbed beams, which seems to be useful for the task of improving signal transmission, resulting in Great backlash, though, the “non-Hermitian” effect has become a key focus of modern optics.
For beams that can selectively magnify or attenuate specific parts of the beam at the microscopic level to counteract any degraded parts, to stay in the picture of the nebula, the light-scattering properties can be manipulated, says doctoral student Andrea Steinfurth, first author of the paper. completely inhibited, so a material is being actively modified so that it can transmit a specific light signal optimally. “
Induced transparency is just one of the fascinating possibilities these discoveries open up. If an object is really going to disappear, it’s not enough to just prevent scattering. Instead, light waves must appear behind completely undisturbed, yet even in the vacuum of space, only Make sure that any signal inevitably changes its shape.
The findings presented in this work represent a breakthrough in fundamental research in non-Hermitian photonics and provide new methods for active fine-tuning of sensitive optical systems, such as sensors for medical use, or other potential applications including optical encryption and secure data transmission, as well as the synthesis of multifunctional man-made materials with tailored properties.
(Source of the first image: University of Rostock)
New technological knowledge, updated from time to time