Near-field radiative thermal transfer between a nanostructured periodic material and a planar substrate
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
- Technion-Israel Inst. of Technology, Haifa (Israel)
This paper provides a method based on rigorous coupled wave analysis for the calculation of the radiative thermal conductance between a layer that is patterned with arbitrary, periodically repeating features and a planar substrate. This method is applied to study the transfer from an array of beams with a rectangular cross section. Herein the impact of the structure size and spacing on the thermal conductance are investigated. These calculations are compared to an effective medium theory, which becomes increasingly accurate as the structure sizes fall well below the relevant resonance wavelengths of materials and structures. Moreover, comparisons are made with a modified proximity approximation and the far-field approximation, which become valid for small and large spacings, respectively. Results show that new levels of control over the magnitude and spectral contributions to thermal conductance can be achieved with corrugated structures relative to planar ones. Specifically, we show for SiC arrays with rectangular cross sections and with the same filling fraction, that the use of a smaller periodicity leads to a lowered far-field thermal transfer and an increased near-field thermal transfer.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0001293
- OSTI ID:
- 1387273
- Alternate ID(s):
- OSTI ID: 1180291
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 1; Related Information: LMI partners with California Institute of Technology (lead); Harvard University; University of Illinois, Urbana-Champaign; Lawrence Berkeley National Laboratory; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Near-field radiative heat transfer in three-body systems with periodic structures
|
journal | January 2019 |
| Radiative heat transfer in many-body systems: coupled electric and magnetic dipole approach | text | January 2017 |
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