Figure 4From: Coupled nanowire-based hybrid plasmonic nanocavities on thin substratesThe waveguide confinement factor, modal loss, and transparency threshold gain versus r Ag . (a) The waveguide confinement factor Γwg, (b) modal loss αi, and (c) transparency threshold gain gtr of the fundamental hybrid plasmonic modes as a function of rAg for rGaN= 40, 50, or 60 nm on thick (t=500 nm) and thin substrate (t=5 nm).Back to article page