Active Thermal Metasurfaces for Remote Heating/Cooling by Mimicking Negative Thermal Conductivity

• DOI: 10.1002/adma.202210981
• Publication Date: 2023-04-15T15:49:00Z
• Authors: Yichao Liu; Kun Chao; Fei Sun; Shaojie Chen; Hongtao Dai; Hanchuan Chen
• Keywords: Thermal effusivity; Thermal transmittance

Remote temperature control can be obtained by a long-focus thermal lens that focus heat fluxes into spot far away from the back surface of and create virtual source/sink in background material, around which field distribution remotely controlled changing parameters lens. However, due to lack negative conductivity, existing lenses have extremely short focal lengths cannot used source/sink. In this study, we theoretically propose general approach equivalently realize conductivity elaborately distributed active metasurface (ATMS), then use proposed ATMS implement novel with long length designed transformation thermodynamics, experimentally verify performance measured f=19.8mm for remote heating/cooling. The method expands scope open up new ways unprecedented effects effective such as "thermal plasmon polaritons", superlens, tunneling effect, invisible gateway.