Search by tag «Nano Letters» 5 results

  • ITMO Scientists Discover Nonlinear Circular Dichroism in Mie-Resonant Nanoparticle Dimers

    The discovered effect may potentially be used to create special sensors for chiral molecules. These molecules are particularly useful to the pharmaceutical industry, but have a unique structure that makes them difficult to detect. The related article was published in Nano Letters.


  • ITMO Physicists Discover Way to Achieve Stimulated Raman Scattering in Isolated Silicon Nanoparticles

    An optimized design of silicon nanoparticles provides а more efficient transition from spontaneous to stimulated Raman scattering. The proposed approach also allowed researchers to reduce the size and volume of particles supporting the stimulated Raman scattering regime by tens of times compared to their existing counterparts. The researchers also designed a platform in the form of a silicon nanoparticle on a sapphire surface that can be applied in sensing, detection, and thermometry, opening up new opportunities for future applications in biomedicine, targeted drug delivery, and as an alternative to electronic devices in optical chips. The results of the research were published in Nano Letters.


  • Physicists Propose Reversible Adjustment of Nanoparticles Color

    A team of ITMO University scientists and their international colleagues has developed a method of reversible adjustment of the nanosized light sources radiation color. While earlier studies suggested that the radiation color could only be specified during the nanoparticle synthesis stage, the new research reveals that it also can be changed in fully-formed particles. Stability and electromagnetic resonances of the particles are retained during this adjustment, which opens new possibilities for production of optical chips, LEDs, and optoelectronic devices. The findings are published in Nano Letters.


  • New Non-Linear Metasurface Changes Basic Properties of Light

    An international research team has produced the first-ever dielectric metasurfaces for nonlinear light conversion. Using these structures, scientists have been able to convert infrared radiation into visible light. They have also been able to implement additional functions: an ability to deflect light at a specific angle and to change the light polarization. Kirill Koshelev, a researcher at the Nanophotonics and Metamaterials Laboratory and one of the study’s authors, spoke to ITMO.NEWS about the project and the significance of its results.


  • Researchers From ITMO Create First-Ever Light-Emitting Nanoantennas

    Young scientists from ITMO University have developed a new type of nanoscale light sources based on halide perovskites. The nanosources are subwavelength nanoparticles which serve both as emitters and nanoantennas capable of amplifying light emission inherently without need for additional devices. Moreover, perovskites enable tuning of emission spectrum throughout a visible range by varying the composition of the material. This makes the new nanoparticles a promising platform for creating compact optoelectronic devices such as optical chips, light-emitting diodes, or sensors. The results were published in Nano Letters, one of the leading journals on nanophotonics.