The tunable solid-state thermal rectification of a three-terminal device is presented by asymmetric nonlinear far-field radiation. The experimental findings are supplemented with finite element analysis, with a maximum rectification ratio of 93.1%.

A high thermal rectification efficiency (33%) is experimentally achieved by designing specimens based on the Frenkel–Kontorova model. The elastic modulus asymmetry is carefully controlled in centimeter-scale bilayered specimens.