Electrodynamic interaction between a nanoparticle and the surface of a solid

Phys Rev E Stat Nonlin Soft Matter Phys. 2013 Nov;88(5):052403. doi: 10.1103/PhysRevE.88.052403. Epub 2013 Nov 11.

Abstract

We study the interaction between a nanoparticle and the surface of a solid in the framework of the local-field method. Assuming that the nanoparticle is characterized by a finite nonlinear polarizability, we obtain the interaction potential that is repulsive at short range and has an attractive long-range tail. Our numerical analysis shows that this potential strongly depends on the shape and size of the particle. Further, we study the particle-surface interaction in the presence of a surface plasmon polariton propagating along the interface. It is shown that the excitation of the surface wave leads to a drastic (about one order of magnitude) increase in the binding energy. Potential applications of this effect are discussed.