Discrete-dipole approximation with surface interaction: Computational toolbox for MATLAB

We describe a MATLAB toolbox that utilizes the discrete-dipole approximation (DDA) method for modelling light interaction with arbitrarily-shape scatterers in free space as well with planar surface interaction (DDA-SI). The range of applicable models range from optical micromanipulation, plamonics, nano-antennae, near-field coupling and general light interaction with scatterers ranging from a few nanometers to several microns in size.

► Discrete-dipole approximation with surface interaction (DDA-SI). ► Public domain MATLAB toolbox. ► Near field coupling between a gold AFM probe and a 20 nm nanoparticle. ► Substrate illuminated by a TM evanescent electric field.