Dipanjan Gope, Albert E. Ruehli, et al.
IEEE T-MTT
In this Letter, we introduce a new nanoantenna concept aimed at generating a single magnetic hot spot in the optical frequency range, thus confining and enhancing the magnetic optical field on the background of a much lower electric field. This nanoantenna, designed by applying Babinet's principle to the bowtie nanoaperture, takes the shape of a diabolo. It differs from the well-known bowtie nanoantenna in that the opposing pair of metal triangles are electrically connected through their facing tips. Thus instead of a large charge density accumulating at the air gap of the bowtie nanoantenna, leading to a large electric field, a high optical current density develops within the central "metal gap" of the diabolo nanoantenna, leading to a large magnetic field. Numerical simulation results on the first nanodiabolo geometries show a 2900-fold enhancement of the magnetic field at a wavelength of 2540 nm, confined to a 40-by-40 nm region near the center of the nanoantenna. © 2011 American Chemical Society.
Dipanjan Gope, Albert E. Ruehli, et al.
IEEE T-MTT
Hiroshi Ito, Reinhold Schwalm
JES
A. Ney, R. Rajaram, et al.
Journal of Magnetism and Magnetic Materials
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000