Design of hourglass nanoantenna for magnetic field enhancement

In this paper we report a novel design of hourglass nanoantenna for the enhancement of magnetic field in the near infrared region. The designed hourglass nanoantenna has been thoroughly analysed by varying various geometrical parameters to find their effect on magnetics field enhancement. Also, different materials have been considered for the nanoantenna, to investigate the significance of the choice of the material effect on magnetic field enhancement. The proposed structure can prove to be a good alternative for the enhancement of magnetic field as compared to the various paramagnetic and ferromagnetic materials, having weak magnetic properties in the optical regime.