Near-field radiative heat transfer between nonpolar epsilon-near-zero dielectric-filled Si gratings

Cui, Gui-Cheng; Zhou, Cheng-Long; Zhang, Yong; Yi, Hong-Liang

doi:10.1103/physrevb.109.125430

Phys. Rev. B

2024

DOI: 10.1103/physrevb.109.125430

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Near-field radiative heat transfer between nonpolar epsilon-near-zero dielectric-filled Si gratings

Gui-Cheng Cui,

Cheng-Long Zhou,

Yong Zhang

et al.

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Control of the near-field radiative heat transfer between graphene-coated nanoparticle metasurfaces

Castillo-López,

Cortés-López,

Castillo-López

2024

Sci Rep

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The control of near-field radiative heat transfer (NFRHT) between two metasurfaces can be achieved by manipulating the geometric and dielectric parameters of their components. Based on a 2D effective medium approximation, we describe the dielectric response of each metasurface composed of graphene-coated nanoparticles (GCNPs) on a 2D square lattice as a homogeneous uniaxial film. Wrapping Drude-like nanoparticles (NPs) with graphene enhances the effective plasmonic response of metasurfaces by significantly broadening the frequency range in which surface and hyperbolic waves can be excited by thermal photons. Consequently, the NFRHT between GCNP metasurfaces improves that observed between uncoated Drude-like nanoparticle arrays. We found that the heat flux (Q) grows with increasing metasurface packing fraction (PF) and is also sensitive to GCNP size. By tuning the graphene chemical potential , Q reaches a maximum improvement of for eV with cores made of Drude-like material, while using cores made of the polar dielectric SiC, Q increases up to for eV. Our results show that, in addition to the geometric control achieved with uncoated NP arrays, the tunable optical properties of the graphene shell allow dynamic control of the heat flux, expanding the possibilities for NFRHT engineering offered by GCNP metasurfaces.

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Control of the near-field radiative heat transfer between graphene-coated nanoparticle metasurfaces

Castillo-López,

Cortés-López,

Castillo-López

2024

Sci Rep

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show abstract

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Near-field radiative heat transfer between nonpolar epsilon-near-zero dielectric-filled Si gratings

Cited by 1 publication

References 45 publications

Control of the near-field radiative heat transfer between graphene-coated nanoparticle metasurfaces

Control of the near-field radiative heat transfer between graphene-coated nanoparticle metasurfaces

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