Figure 6
From: State-of-the-art and prospects for intense red radiation from core–shell InGaN/GaN nanorods

(a, b) Images of calculated eigenvalues of the electromagnetic field for two geometries at different wavelengths (R, G, B). Geometry (a) corresponds to wide NRs (type A1) with a cylinder part with radius \(\hbox {r}_1 = 650\) nm, height \(\hbox {h}_1 = 600\) nm and a conical part with \(\hbox {h}_2=650\) nm. Geometry (b) corresponds to narrow NRs (type A2) with a cylinder part with \(\hbox {r}_1 = 390\) nm, \(\hbox {h}_1 =1500\) nm and a conical part with \(\hbox {h}_2=500\) nm. In both cases, upper radius \(\hbox {r}_2 = 50\) nm. (c) Proposed design of a hybrid NR structure.