Near-Field Thermal Coupling of a Nanoscale Interface and QED Kapitza Conductance of Nano-Carbon Thermal Interconnect Materials
Abstract
Theory of near-field thermal coupling between a nanocarbon material and various substrates was derived. Models were developed to cover a range of nanocarbon dimensions (1D, 0D and 2D), from nanotube films to forests and to graphene layers. A broad range of semiconductor, insulator and metal substrate materials was numerically studied. Materials parameters for optimization of QED Kapitza conductance were determined, including: optimal distance which in turn depends on the frequency of the substrate surface polariton mode and the Fermi velocity or plasmon phase velocity in nanocarbons; optimal width of the thermal interconnect film; large surface polarization of the substrate materials; plasmon frequency of metal substrates; doping level for nanocarbon materials. Analytical models were developed to support the simulations and explain background physics of the process, including non-equilibrium statistical models for strong coupling regime, beyond perturbative solutions. New fundamental effects were uncovered: topological localization of surface polaritons at the nanocarbon wires of lower dimension; development of non-equilibrium (non-thermal) distribution functions of non-perturbatively coupled surface 2D modes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 26, 2015
- Accession Number
- AD1001823
Entities
People
- Vyacheslav V. Rotkin
Organizations
- Lehigh University