Ak. Sarychev et al., Anderson localization of surface plasmons and Kerr nonlinearity in semicontinuous metal films, PHYSICA B, 279(1-3), 2000, pp. 87-89
We predict that in the optical and infrared spectral ranges the local field
s in semicontinuous metal films are very inhomogeneous and consist of sharp
peaks representing localized surface plasmons. The localization maps the A
nderson localization problem described by the random Hamiltonian with both
on- and off-diagonal disorder. The local fields exceed the applied field by
several orders of magnitudes resulting in giant enhancements of various op
tical phenomena including Kerr nonlinearity. The Kerr effect has characteri
stic dip at the percolation threshold due to the strong dependence of the K
err effect on the localization length of the surface plasmons. (C) 2000 Pub
lished by Elsevier Science B.V. All rights reserved.