Figre 4

Results of the experiments and near-field intensity calculations at 100-nm distance above the glass plate. Optical signal profile measured at the distance of 100 nm above the sample surface (thick lines) and the the square of electric field modulus at the same distance from the sample surface calculated using COMSOL Multiphysics®; (thin lines). The results of the three different wavelengths are presented; marks 1 to 10 correspond to the stamp groove width from 100 to 600 nm as shown in Figure 2a.