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Spitzer, F.; Poddubny, A. N.; Akimov, I. A.; Sapega, V. F.; Klompmaker, L.; Kreilkamp, L. E.; Litvin, L. V.; Jede, R.; Karczewski, G.; Wiater, M.; Wojtowicz, T.; Yakovlev, D. R.; Bayer, M.
Nature physics, 10/2018, Volume: 14, Issue: 10Journal Article
Magneto-optical phenomena such as the Faraday and Kerr effects play a central role in controlling the polarization and intensity of optical fields propagating through a medium. Intensity effects in which the direction of light emission depends on the orientation of the external magnetic field are of particular interest, as they can be harnessed for routing light. Effects known so far for accomplishing such routing all control light emission along the axis parallel to the magnetic field. Here we report a new class of emission phenomena where directionality is established perpendicular to the externally applied magnetic field for light sources located in the vicinity of a surface. As a proof of principle for this effect, which we call transverse magnetic routing of light emission, we demonstrate the routing of emission for excitons in a diluted-magnetic-semiconductor quantum well. In hybrid plasmonic semiconductor structures, we observe significantly enhanced directionality of up to 60%.
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