Search by tag «Polariton » 7 results

• ITMO’s Monday Science Roundup #58

  It’s that time again – the time for our biweekly review of top reports from ITMO.NEWS. There’s plenty of ground to cover this week: we’ve got cutting-edge research by the Faculty of Physics, comprehensive explainers on AI and hacking courtesy of top experts, and two great new Bachelor’s and Master’s programs for ambitious students. Have a look!

  01.07.2024

• New Discovery Makes Cheap, Compact Lasers Possible

  Researchers from ITMO have demonstrated a novel technique for generation of laser radiation that utilizes perovskite metasurfaces. The solution will pave the way for next-gen lasers that are less than 100 nm thick and require significantly less energy. The invention can be incorporated into compact photonic chips for light control or used as an intense light source in medicine (e.g., for tissue or blood diagnostics), materials processing, astronomy, and other fields. The results of this study were published in the journal Advanced Functional Materials.

  04.04.2023

• ITMO University Researchers Predict New Quantum Phase of Matter in Chains of Oscillating Atoms

  The results of this research can be used to control the properties of light and matter and to create quantum memory.

  05.11.2020

• Researchers Demonstrate a Platform for Future Optical Transistors

  Leading research groups in the field of nanophotonics are working toward developing optical transistors –  key components for future optical computers. These devices will process information with photons instead of electrons, thus reducing the heat and increasing the operation speed. However, photons do not interact with each other well, which creates a big problem for microelectronics engineers. A group of researchers from ITMO University, together with colleagues, have come up with a new solution to this problem by creating a planar system where photons couple to other particles, which enables them to interact with each other. The principle demonstrated in their experiment can provide a platform for developing future optical transistors. The results of their work are published in Light: Science & Applications.

  13.04.2020

• Physicists Discover Way to Control Transitions Between States of Matter

  An international team of physicists has managed for the first time to experimentally observe a transition between two different states of matter: a propagating polariton-soliton and a Bose-Einstein condensate. Furthermore, the researchers developed a theoretical model to explain such transitions and found a way to “switch” between the different states by changing the laser pumping power in the polariton formation process. The results are published in Physical Review Letters.

  24.04.2018

• Physicists Create Crystal Lattice from Polaritons

  An international research team has produced an analog of a solid-body crystal lattice from hybrid photon-electron quasiparticles - polaritons. In the resulting polariton lattice, certain particles’ energy does not depend on their speed. At the same time, the lattice’s geometry, particle concentration and polarization properties can still be modified. This opens up new perspectives for study of quantum effects and the use of optical computing. Results of the study were published in Physical Review Letters.

  19.03.2018

• Scientists Achieve Breakthrough in Polariton Laser Technology

  An international scientific team has modeled and conducted an experiment in the course of which they have managed to produce an electrically pumped spin-polarized polariton laser. This allows for a reduction in the laser’s energy consumption levels and control over the output polarization. This is achieved thanks to the use of magnetic materials in the device’s contacts: the electrons that come into contact with the laser have a preferred spin direction, which allows for effective spin pumping. Polariton lasers are very promising for the very reason that they do not require high amounts of energy. In addition, they work at room temperatures. Due to this, they can be used in portable electronics, optical computers and communication devices. Results of the experiment have been published in Physical Review Letters.

  06.09.2017