Based on the structure of metal parallel plates, this paper points out that thermal radiation in near field is greatly enhanced due to near-field effect, exceeding Planck’s blackbody radiation law. To study the effect of graphene on thermal radiation in near field, we add graphene layer into the structure. The result indicates that the graphene layer effectively suppresses the near-field thermal radiation between metal plates, having good ability of thermal insulation. In consideration of the thickness of 0.34nm of single-layer graphene, we can say graphene plays a very important role in controlling the near-field thermal radiation.

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