One-click electromagnetism at the nanoscale
Placed tip to tip, two rods couple their longitudinal plasmons: the gap field becomes much stronger than at a single tip, and the coupled resonance red-shifts as the gap closes.
Yes: the two spheroids are coupled through their T-matrices with exact translation of the multipole fields.
Choose the arrangement of the two rods relative to each other and to the incoming light; tip-to-tip gives the strongest gap field, side-by-side a blue-shifted mode.
Gap hot spots between two nanorods, from an exact coupled T-matrix, in one click.