Magnetoelectric effects in local light-matter interactions

Konstantin Y. Bliokh, Yuri S. Kivshar, Franco Nori

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    111 Citations (Scopus)

    Abstract

    We study the generic dipole interaction of a monochromatic free-space electromagnetic field with a bi-isotropic nanoparticle or a molecule. Contributions associated with the breaking of dual, P, and T symmetries are responsible for electric-magnetic asymmetry, chirality, and the nonreciprocal magnetoelectric effect, respectively. We calculate absorption rates, radiation forces, and radiation torques for the nanoparticle and introduce novel field characteristics quantifying the transfer of energy, momentum, and angular momentum due to the three symmetry-breaking effects. In particular, we put forward a concept of "magnetoelectric energy density," quantifying the local PT symmetry of the field. Akin to the "superchiral" light suggested recently for local probing of molecular chirality, here we suggest employing complex fields for a sensitive probing of the nonreciprocal magnetoelectric effect in nanoparticles or molecules.

    Original languageEnglish
    Article number033601
    JournalPhysical Review Letters
    Volume113
    Issue number3
    DOIs
    Publication statusPublished - 16 Jul 2014

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