Fig. 2: Spectral evolution of the anapole condition at normal and in-plane incidence. | Light: Science & Applications

Fig. 2: Spectral evolution of the anapole condition at normal and in-plane incidence.

From: Radiationless anapole states in on-chip photonics

Fig. 2

a Anapole-condition and maximum-energy wavelengths for normal and in-plane incidence as a function of the disk radius r. The wavelength at which a minimum of the out-of-plane scattering is observed under waveguide illumination is also shown. b Wavelength difference between the energy maximum and the anapole for the cases represented in a. Calculated electric-field amplitude patterns in a disk of r = 350 nm at the relevant wavelengths for both c normal and d in-plane incidence. The black arrows indicate the polarization direction of the incident electric field. Scale bar: 500 nm. The calculations have been performed using COMSOL Multiphysics (see “Methods”)

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