Radiation patterns and near-field distributions of electric field of GNR (a = 30 nm, AR = 8). (a) First (λ1 = 1,910 nm), (b) second (λ2 = 970 nm), (c) third (λ3 = 710 nm), and (d) fourth (λ4 = 610 nm) modes, where n = 1.25, d = 15 nm; φ = 0° for (a) and (c); φ = 180° for (b) and (d). Color bars are in logarithm scale.
Liaw et al. Nanoscale Research Letters 2012 7:546 doi:10.1186/1556-276X-7-546