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Revisiting the Surface Impedance and Effective Medium Models Applied to Near‐Field Radiative Heat Transfer
Author(s) -
Pérez-Rodríguez Jaime E.,
Pirruccio Giuseppe,
Esquivel-Sirvent Raul
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900498
Subject(s) - radiative transfer , heat transfer , field (mathematics) , surface (topology) , materials science , electrical impedance , dielectric , polar , computational physics , thermal radiation , mechanics , physics , optics , thermodynamics , optoelectronics , mathematics , geometry , quantum mechanics , astronomy , pure mathematics
The role of the optics of surface and interfaces in the near‐field radiative heat transfer for finite‐layered media and superlattices is reviewed. The definition of surface impedance is compared with effective medium approximations for the dielectric functions. It is shown that the presence of polar materials makes the use of effective medium models ineffective, in particular, when the topmost layer supports surface modes. Furthermore, the effect on the near‐field heat transfer is quantified when approximate methods are used.