Tailoring near-field thermal radiation between metallo-dielectric multilayers using coupled surface plasmon polaritons

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Several experiments have shown a huge enhancement in thermal radiation over the black-body limit when two objects are separated by nanoscale gaps. Although those measurements only demonstrated enhanced radiation between homogeneous materials, theoretical studies now focus on controlling the near-field radiation by tuning surface polaritons supported in nanomaterials. Here, we experimentally demonstrate near-field thermal radiation between metallo-dielectric multilayers at nanoscale gaps. Significant enhancement in heat transfer is achieved due to the coupling of surface plasmon polaritons (SPPs) supported at multiple metal-dielectric interfaces. This enables the metallo-dielectric multilayers at a 160-nm vacuum gap to have the same heat transfer rate as that between semi-infinite metal surfaces separated by only 75 nm. We also demonstrate that near-field thermal radiation can be readily tuned by modifying the resonance condition of coupled SPPs. This study will provide a new direction for exploiting surface-polariton-mediated near-field thermal radiation between planar structures.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2018-10
Language
English
Article Type
Article
Citation

NATURE COMMUNICATIONS, v.9

ISSN
2041-1723
DOI
10.1038/s41467-018-06795-w
URI
http://hdl.handle.net/10203/246560
Appears in Collection
ME-Journal Papers(저널논문)
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