2ND-HARMONIC GENERATION FROM DISORDERED 1D CHAINS OF POLARIZABLE-SPHERES

To investigate the effects of disorder in surface second-harmonic gene ration (SHG), we consider a 1D disordered chain of polarizable spheres embedded on an inert substrate. Each sphere is identical to the other and responds non-linearly to the local field and to its gradient, lik e an isotropic harmonic oscillator. The effective non-linear polarizat ion of the chain is ensemble averaged over different algorithms of the disorder and their consequences in the SHG yield are presented and di scussed.