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New nanoresonators for frequency conversion of light at the nanoscale

An international research team within the Project Erasmus Mundus NANOPHI, guided by the Department of Information Engineering of the University of Brescia, 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 financially supported by the Russian Science Foundation and by EU, and published in Physical Review Letters on July 19, 2018 as a cover story. The research group included  University of Brescia (Luca Carletti e Costantino De Angelis) gruppo di campi elettromagnetici e fotonica, University of Brescia), ITMO University of  S. Petersburg and Nonlinear Physics Centre of the Australian National University in Canberra (Kirill Koshelev e Yuri Kivshar).

Monday, August 27, 2018