Search by tag «Resonators» 8 results

• Improving Lasers: ITMO Scientists Suggest a New Way to Couple Light and Matter

  A new approach has been suggested at ITMO to enhance interaction of light and matter during metamaterials production. Compared to conventional methods, the novel approach requires less precision and relies on cheaper equipment, while producing more compact and sensitive lasers. The study was described in an article published in Nano Letters. 

  20.07.2023

• ITMO Scientists Develop Ultracompact Optical Switch

  The new device includes a structure of single-atom semiconductors and an ultracompact nanoresonator. The switching is conducted with light, via changes in the exciton states in each of the two semiconductor layers. Thanks to its ultracompact size (10 nanometers long and 1.5 nanometers thick), the device can be placed on a chip for use as a logic element in computers for optical information processing. The results of this study, conducted in collaboration with Pohang University of Science and Technology (POSTECH, South Korea), are described in an article published in ACS Nano. 

  22.03.2023

• 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

• A Necklace of Resonators: How Scientists Efficiently Control Light in Nanoscale

  ITMO University researchers and their collaborators presented a new principle of creating laser resonators. It will allow them to create light generating elements right on silicone chips. In this ITMO.NEWS article, you will learn how it can be used and how it can improve data transfer rate.

  11.12.2020

• Russian Scientists Develop Super Resonator in the Microwave Range

  Results of the research performed by a joint team of physicists from ITMO University, Saint Petersburg Electrotechnical University "LETI", and the Australian National University, can be used to design highly efficient compact elements for microwave and optical devices, particularly elements for optical computers.

  16.11.2020

• ITMO Scientists Propose an Improved Technology for Detecting Ultra-Low Magnetic Fields

  It is for several years now that ITMO University scientists have been working on the creation of supersensitive sensors for measuring ultra-low magnetic fields that occur, for example, in the brain. These sensors can be made from compact ceramic resonators and defect ensemble (NV centers) in a diamond. Recently, the physicists have published an article in the Review of Scientific Instruments journal, where they described a new, more efficient version of an antenna for such measuring devices. ITMO.NEWS spoke with the authors to find out why we should measure the magnetic field of the human brain, and how this is proposed to be done. 

  01.04.2020

• Physicists Trap Light in Nanoresonators for Record Time

  An international team of researchers from ITMO University, the Australian National University, and Korea University have experimentally trapped an electromagnetic wave in a gallium arsenide nanoresonator a few hundred nanometers in size for a record-breaking time. Earlier attempts to trap light for such a long time have only been successful with much larger resonators. In addition, the researchers have provided experimental proof that this resonator may be used as a basis for an efficient light frequency nanoconverter. The results of this research have raised great interest among the scientific community and were published in Science, one of the world’s leading academic journals. Scientists have suggested drastically new opportunities for subwavelength optics and nanophotonics – including the development of compact sensors, night vision devices, and optical data transmission technologies.

  17.01.2020

• Nanoscale Super-Resonator Extends Light Lifetime

  Scientists designed the first subwavelength dielectric resonators for light trapping at nanoscale that appears to be the simple silicon cylinder which is a hundred times thinner than a human hair. Such a structure is capable of trapping light ten times longer than any conventional resonator. Along with a simple shape and small size, this new resonator is a promising basis for the design of powerful nanolasers, biosensors, and various light transmitting devices. The results were published in Physical Review Letters.

  18.12.2017