Near-field electromagnetic coupling between nanoparticles in dielectric media has led to new advances in next generation technologies such as photonic integrated circuits and photonic sintering. Understanding the light confinement between nanoparticles at subwavelength dimensions is vital in such applications. For instance, the wavelength of the incident light, dielectric medium properties, nanoparticle size, interparticle spacing, and relative orientation between the nanoparticles affect the near-field plasmonic interactions that characterize the thermal energy transport. In this study, we perform a field intensity analysis by looking at the relative orientation of gold (Au) and copper (Cu) nanoparticles which have 25, 50 and 100 nm radius under 532 nm laser irradiation in different surrounding medium to understand the thermal energy transport between the nanoparticles at different relative orientations.

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