To simulate EET along the NP chains, we excite only the first Ag NP in the chain using a monochromatic laser (using a similar approach discussed in the tutorial section) with an energy equal to the plasmonic resonance energy of a single Ag NP (3.23 eV). With this chosen initial condition, the entire system is allowed to evolve in time according to Eq. (2). To quantify the EET efficiency along the chain, we can compute the electric field intensities, I = 0 /µ 0 × |E| 2 , at identical points between each of the NPs along the axial direction shown in Fig. . E is the total electric field, and 0 and µ 0 are the permittivity and permeability of free space, respectively. Fig. shows the intensity trends of the NP chains with interparticle distances ranging from 0 to 5 Å. From the intensity trends in Fig. , we observe a monotonic increase in the EET efficiency (i.e., the slope of the intensity lines decreases) as the interparticle distance is reduced from 5 to about 2 Å. This result is in qualitative agreement with previous studies on similar systems using classical electrodynamic methods. This increase in EET efficiency can be attributed to an increase in capacitive coupling between the Ag NPs as the interparticle distance between them is reduced. In other words, this phenomenon is analogous to a charged capacitor, where the capacitance of a capacitor increases as the charged plates are brought closer together. However, as the interparticle distance is further reduced below 2 Å, we observe an opposite trend of the EET efficiency. In particular, we see a sudden drop in EET efficiency for interparticle distances below 2 Å (i.e., the slope of the intensity line increases). This result is qualitatively opposite to what has been predicted by previous computational studies that have observed a decrease in EET when the NPs directly touch each other.