A model of a structure consisting of nonperiodic closely spaced metal nanoparticles array, in which electromagnetic energy can be transported and splitted below the diffraction limit, is founded. Based on finite difference time domain (FDTD) algorithm, we analyze the power transmission properties of nonperiodic silver nanoparticles arrays in a dielectric waveguide. The numerical results indicate the structure can split light along the array at the nanometer level with no radiative losses at the discontinuity.