STUDY ON RADIATIVE THERMAL TRANSPORT OF A MAGNETO-OPTICAL NANOWIRE

Radiative heat transfer (RHT) is an open problem with many implications for the fundamentals and techniques of various disciplines. Based on the Fluctuation Dissipation Theorem (FDT) and Electromagnetic Scattering Theory (EST), this work aims to explore the RHT between nanoparticles (NPs) in a many-body system composed of two NPs and a magneto-optical nanowire (NW). The results show that for a fixed distance d, the RHT between NPs basically first increases and then decreases with the increase in radius. The size effect of the NW has a significant impact on energy transport. Compared to a two-particle system in a vacuum, NW can promote the RHT between NPs over long distances with an enhancement ratio of more than eight orders of magnitude. It is found that the thermal conductance decreases with the increase of the external magnetic field H, while the change is negligible as compared to the contribution from the NW. In addition, the thermal transport property of the NW can be changed with an increase in the angle between the connection line of the two NPs and the axis of the NW. The external magnetic field can tune the transport behavior of the NW, thus facilitating active regulation of the RHT between NPs. Our work paves the way for active control of energy transport via surface modes in an anisotropic NW and opens the possibility of achieving long-range thermal conversion and management in magneto-optical systems.