This talk explores extreme near-field thermal transport between two parallel plates made of silica (SiO2) and gold, with gap distances ranging from approximately 0.5 nm to 2 nm. While recent experiments have shown that several orders of magnitude can enhance radiative heat flux between planar surfaces at gaps around 10 nm, the regime of sub-10 nm separations remains largely unexplored. Here, non-equilibrium molecular dynamics (NEMD) simulations are employed to investigate heat transfer between silica plates in both amorphous and crystalline forms, as well as between two planar gold surfaces. The simulation results are compared with predictions from fluctuational electrodynamics, showing generally good agreement- particularly for larger gap sizes. By performing a spectral analysis of the heat transfer coefficients across a range of temperatures, we identify the contributions of different transport modes and provide new insights into the mechanisms governing nanoscale energy transfer. These findings offer valuable guidance for future experimental and theoretical studies in extreme near-field heat transfer.




Venue: Room D, 3rd Floor, Farmanieh Building, IPM
Link: https://vmeeting2.ipm.ir/b/nan-gkn-wmh-exh