Experimental observation of optical size resonances in dimers at the surface of isotropic media in the case of anisotropic reflection of light

It is shown that theoretically predicted optical size resonances in diatomic nanostructures manifest themselves in As dimers at the clean GaAs(100) surfaces in the case of anisotropic reflection of light. The polarizing contribution of the substrate to effective polarizabilities of the dimer atoms was taken into account. Formulas for the reflectance of the surface with dimers were derived.