Fig. 3: Evolution of CL and EELS spectra for nanoantenna arrays with different tilt angles.
From: Nanoscale mapping of optically inaccessible bound-states-in-the-continuum
a Measured EELS spectra, b reflectance spectra under x-polarized incidence condition, and c CL spectra from the nanoantenna array with different tilt angle θ of 90°, 80°, and 70°. d Spatial distribution of the electric field |E| at the quasi-BIC resonance at ~720 nm for the nanoantenna array with a tilt angle θ of 70°. The arrows denote the electric field direction, the length of the arrows being proportional to the amplitude. e Multipolar decomposition of the scattering cross-section (SCS) and corresponding schematics of the multipoles excited at the quasi-BIC mode
