Imaging of photonic nanopatterns by scanning near-field optical microscopy

Maas HJ, Naber A, Fuchs H, Fischer UC, Weeber JC, Dereux A

Abstract

We define photonic nanopatterns of a sample as images recorded by scanning near-field optical microscopy with a locally excited electric dipole as a probe. This photonic nanopattern can be calculated by use of the Green's dyadic technique. Here, we show that scanning near-field optical microscopy images of well-defined gold triangles taken with the tetrahedral tip as a probe show a close similarity to the photonic nanopattern of this nanostructure with an electric dipole at a distance of 15 nm to the sample and tilted 45degrees with respect to the scanning plane. (C) 2002 Optical Society of America.