Figure 33.

(a) scheme of a dielectric elliptical stick. The different parameters are available in [189]; (b) $|E^b(y)|$ corresponds to the field along the stick shaft for several lengths b. External $E^e$-field and its tangent projection $E_y^e$ in the absence of the stick are also displayed. Field peaks shows that the electrical field is confined in the nanovolume near the apex of the stick, reprinted figure with permission from [189]. Copyright (2017) by the American Physical Society.