Figure 7
From: Special scattering regimes for conical all-dielectric nanoparticles
(a) Resonant wavelength shifts of the QNMs in the vicinity of the HA, as a function of conicity. In an unperturbed cylinder, QNMs M1 and M2 correspond to \({\text{TE}}_{120}\) and \({\text{TM}}_{113}\) discussed in Ref.33. M3 is associated with \({\text{TM}}_{111}\). Insets depict the internal fields of the QNMs for selected values of conicity (red–more intense field, blue–less intense field). In all the calculations we neglected the dispersion of Si, and fixed its value to an average in the spectral range under consideration, \(n \approx 3.45\). (b) Intrinsic multipole moments of M2 as a function of conicity. To allow a proper visualization, all moments are normalized in ED units, i.e. C.m. \(\tilde{k}_{m} = \tilde{\omega }_{m} /c\) is the (complex) wavevector associated with the m-th QNM.
