120
N. Rahbany et al.
Fig. 5.4 a Procedure for the reconstruction of the scattered EM field. a Recorded hologram resulting from the interference between the reference beam and the light scattered by a NSOM probe
through a plasmonic metal layer. Inset: magnified image showing the interference fringes. b Fourier
transform of the hologram showing the three diffraction orders in k-space: zeroth order of diffraction in the center, +1 interference term (highlighted by the red circle, yields the virtual image after
reconstruction) and the −1 interference term (real image). c Images of the field scattered by the tip
in planes perpendicular to the tip axis, at distances varying between z = 0 and z = 10 μm from the
tip
N. Rahbany et al.
Fig. 5.4 a Procedure for the reconstruction of the scattered EM field. a Recorded hologram resulting from the interference between the reference beam and the light scattered by a NSOM probe
through a plasmonic metal layer. Inset: magnified image showing the interference fringes. b Fourier
transform of the hologram showing the three diffraction orders in k-space: zeroth order of diffraction in the center, +1 interference term (highlighted by the red circle, yields the virtual image after
reconstruction) and the −1 interference term (real image). c Images of the field scattered by the tip
in planes perpendicular to the tip axis, at distances varying between z = 0 and z = 10 μm from the
tip