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Observing of the super-Planckian near-field thermal radiation between graphene sheets

Author

Listed:
  • Jiang Yang

    (Zhejiang University)

  • Wei Du

    (Zhejiang University)

  • Yishu Su

    (Zhejiang University)

  • Yang Fu

    (Zhejiang University)

  • Shaoxiang Gong

    (Zhejiang University)

  • Sailing He

    (Zhejiang University)

  • Yungui Ma

    (Zhejiang University)

Abstract

Thermal radiation can be substantially enhanced in the near-field scenario due to the tunneling of evanescent waves. Monolayer graphene could play a vital role in this process owing to its strong infrared plasmonic response, however, which still lacks an experimental verification due to the technical challenges. Here, we manage to make a direct measurement about plasmon-mediated thermal radiation between two macroscopic graphene sheets using a custom-made setup. Super-Planckian radiation with efficiency 4.5 times larger than the blackbody limit is observed at a 430-nm vacuum gap on insulating silicon hosting substrates. The positive role of graphene plasmons is further confirmed on conductive silicon substrates which have strong infrared loss and thermal emittance. Based on these, a thermophotovoltaic cell made of the graphene–silicon heterostructure is lastly discussed. The current work validates the classic thermodynamical theory in treating graphene and also paves a way to pursue the application of near-field thermal management.

Suggested Citation

  • Jiang Yang & Wei Du & Yishu Su & Yang Fu & Shaoxiang Gong & Sailing He & Yungui Ma, 2018. "Observing of the super-Planckian near-field thermal radiation between graphene sheets," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06163-8
    DOI: 10.1038/s41467-018-06163-8
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