Figures and provide strong evidence of RET in the coupled MG-CNP systems. First, we observe dramatic enhancement in the scattering of MG, with the greatest enhancement arising in the case of CNP400, despite the fact that the SMA resonances in CNP600 have larger oscillator strengths and can thus exert a stronger potential upon the acceptor through its transition dipole moment. The superior scattering enhancement from CNP400 can be attributed in part to greater overlap between the absorption features in MG with the SMA resonances in CNP400, as compared to the overlap with those in CNP600. Further, the dipole trajectory of CNP600 shows evidence of interferences between the transition dipoles associated with the multiple SMA resonances. The coupled CNP600-MG system displays a larger induced dipole moment than the uncoupled MG system displays at early times following the excitation of the system. However, the induced dipole in the coupled system decays rapidly (see Figure ). This behavior contrasts with that of the CNP400-MG system, where the dipole moment of the coupled systems persists for longer than that of uncoupled MG. As a consequence, the CNP600-MG system shows a noticeable broadening in its scattering spectrum, while the CNP400-MG system actually shows a narrowing in the scattering spectrum. Both systems show considerable enhancement in population transferred to the sink state of MG, which is another important measure of the RET efficiency. Both coupled systems show nearly a 100-fold increase in population transfer as compared to the lone MG system under the same excitation conditions; the uncoupled system has a final sink population of 7.75×10 -5 , as compared to populations of 4.8×10 -3 and 6.8×10 -3 for the CNP400-MG and CNP600-MG systems, respectively. The sink populations encapsulate both the light-harvesting and RET efficiency of the nanoparticle systems; that is, the CNP600-MG system in this case is seen to have a larger final sink population, but the larger absorption cross section of the CNP600 system also implies that it will absorb more of the incident optical energy under the same illumination conditions.