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Updated: Aug 28, 2025
05:20
Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
17.5K
Modeling effective thermal conductivity enhanced by surface waves using the Boltzmann transport equation
Kuk Hyun Yun1, Bong Jae Lee2, Seong Hyuk Lee3,4
1School of Mechanical Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea.
Scientific Reports
|September 14, 2022
Summary
Surface phonon polaritons (SPhPs) significantly impact heat dissipation in microelectronics. This study numerically estimates SPhP heat transfer in SiO2 films, revealing thickness-dependent thermal conductivity.
Area of Science:
- Materials Science
- Solid State Physics
- Nanoscale Heat Transfer
Background:
- Semiconductor thermal management is critical due to device miniaturization.
- Surface phonon polaritons (SPhPs) offer potential for enhanced heat dissipation.
- Understanding SPhP behavior in thin films is essential for microelectronic thermal design.
Purpose of the Study:
- To numerically estimate heat transfer mediated by SPhPs in thin silicon dioxide (SiO2) films.
- To investigate the size effect of SiO2 films on their effective in-plane thermal conductivity.
- To analyze temperature profiles and heat fluxes influenced by SPhPs.
Main Methods:
- Solving the one-dimensional Boltzmann transport equation (BTE).
- Estimating SPhP propagation length from dispersion curves.
- Numerical prediction of temperature profiles and heat fluxes.
Main Results:
- SPhP propagation length exceeded film dimensions, leading to constant temperature distribution.
- Heat flux increased with decreasing film thickness due to depth-averaged energy transfer.
- BTE-predicted thermal conductivities deviated by approximately 16.5% from analytical results.
Conclusions:
- SPhPs play a significant role in heat transfer within thin SiO2 films.
- Film thickness critically influences effective thermal conductivity via SPhP-mediated heat transport.
- Numerical BTE results provide valuable insights for thermal management in microelectronic devices.
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