Figure 4
From: Unidirectional Spaser in Symmetry-Broken Plasmonic Core-Shell Nanocavity
Evolution of plasmon modes when an FSR is reduced to an SSR.
(a), plasmon modes in an FSR: λres = 520 nm, hexapole mode; λres = 608 nm, quadrupole mode; and λres = 820 nm, dipole mode. (b), plasmon modes in an SSR: λres = 549 nm, quadrupole mode; λres = 634 nm, dipole mode (axial)27; and λres = 1030 nm, dipole mode (transverse)27. Field maps show the total field while arrows show the scattered components.
