https://doi.org/10.1140/epjb/e2018-80596-8
Regular Article
Nonlinear thermotics: nonlinearity enhancement and harmonic generation in thermal metasurfaces
1
Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro and Nano Photonic Structures (MOE), Fudan University,
Shanghai
200433, P.R. China
2
Collaborative Innovation Center of Advanced Microstructures,
Nanjing
210093, P.R. China
a e-mail: jphuang@fudan.edu.cn
Received:
20
October
2017
Received in final form:
5
December
2017
Published online: 29
March
2017
We propose and investigate a class of structural surfaces (metasurfaces). We develop the perturbation theory and the effective medium theory to study the thermal properties of the metasurface. We report that the coefficient of temperature-dependent (nonlinear) item in thermal conductivity can be enhanced under certain conditions. Furthermore, the existence of nonlinear item helps to generate high-order harmonic frequencies of heat flux in the presence of a heat source with periodic temperature. This work paves a different way to control and manipulate the transfer of heat, and it also makes it possible to develop nonlinear thermotics in the light of nonlinear optics.
Key words: Statistical and Nonlinear Physics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2018