Figure 3: Real space images of the lasing action and multipole expansion of scattering for y-polarized planewave.
From: Lasing in dark and bright modes of a finite-sized plasmonic lattice
(a–b) Examples of experimentally observed real space images of the lower (a) and upper (b) energy lasing modes from two different samples. (c–d) Magnitude of the dipole moments (indicated by the colour bar) as a function of position in an array of 85 × 85 silver nanoparticles, computed using a multipole expansion method without a gain medium43, at lower (c) and higher (d) mode energies. The calculated phase of the dipole moments along the dashed lines for both modes are shown in e,f. The scale bars in a–d are 10 μm.
