The effect of core displacement orientation on the resonance properties of nanoegg dimers

In this paper we study the effect of the core displacement orientation in nanoegg dimers on the resonance properties of the dimer. We consider the case of symmetrical nanoegg dimers and uniform nanoegg dimers, where in Symmetrical nanoegg dimers, the core in one nanoegg is displaced in a direction opposite to the direction of core displacement in the other, while in uniform nanoegg dimers, the core displacement is the same in the two nanoeggs. We show how the orientation of the core displacement affects the field enhancement and the resonance wavelength of the dimer.