Search by tag «Electromagnetic waves» 4 results

• Colombian Scientist Juan Domingo Baena Doello on Wirelessly Charging Medical Implants Using Metamaterials

  Juan Baena, a professor at the National University of Colombia, is leading the research project Wave Processes in Medical Systems at ITMO University. His team is developing a wireless charging system for medical implants, including implantable cardioverter-defibrillators (ICDs), that will make non-invasive recharging possible. In this article, Prof. Juan Baena shares details about the ongoing project and explains how soccer brought him to science.

  29.09.2023

• Researchers from ITMO Discover New Photonic Properties of Dielectric Resonators

  We live in a world powered by resonance: there are resonant antennas in our smartphones, and microwaves heat up our food using resonant absorption of electromagnetic radiation by water molecules. Even bridges and skyscrapers remain intact because they were designed to account for the resonance-based nature of various phenomena, such as earthquakes. It is no wonder then that dielectric micro- and nanoresonators are expected to bring about the age of optics, when all electronic devices will be replaced with optical ones. Recently, scientists from ITMO University have contributed to this field by demonstrating new photonic properties of resonators, which make it possible to control their parameters in sensors, detectors, and antennas for different devices. Their study was published in Materials Today. 

  19.01.2023

• Study Reveals The Great Pyramid of Giza Can Focus Electromagnetic Energy

  An international research group applied methods of theoretical physics to study the electromagnetic response of the Great Pyramid to radio waves. Scientists found out that under resonance conditions the pyramid can concentrate electromagnetic energy both in its internal chambers and the area located under its base. The research group plans to apply these findings to design nanoparticles capable of reproducing similar effects in the optical range. Such nanoparticles may be used to develop sensors and highly efficient solar cells. The study was published in the Journal of Applied Physics.

  30.07.2018

• Physicists Design New Nanoresonators With Giant Nonlinear Response

  An international research team has found a way to make frequency conversion of light at the nanoscale a hundred times more efficient. The new method is based on isolated dielectric nanoparticles supporting the so-called bound states in the continuum. Such states appear when radiating fields in the particle suppress each other, so that the electromagnetic energy inside the particle can be trapped. This prediction can be employed for a new generation of tiny frequency conversion devices, nanolasers. The research was published in Physical Review Letters on July 19, 2018 as a cover story.

  26.07.2018