We propose to use channels in strongly scattering nonabsorbing random media for guiding electromagnetic waves, and demonstrate this concept using near-field microscopy of surface plasmon polari-tons (SPP's) propagating along the gold film surface covered with randomly located scatterers. In the wavelength range of 725-765 nm, we observe complete inhibition of the SPP propagation inside the random structures composed of similar to50-nm-wide gold bumps and their clusters with the density of 50 mum(-2), as well as well-defined SPP guiding along corrugation-free 2- and 4-mum-wide channels. References: 16
展开▼
