Self-adaptive near-field radiative thermal modulation using a thermally sensitive bimaterial structure

The active control of the near-field radiative heat transfer has recently aroused significant attention. common methods include utilizing phase-change materials, applying external electric or magnetic field and regulating chemical potential. Herein, we propose a self-adaptive thermal modulation using thermally sensitive bimaterial structure composed gold silicon nitride. Due to huge differences between their Young's moduli expansion coefficients, bending tendency upon sudden temperature change. curved surface influence on transport, which largely depends separation gap two spaced objects. Two different scenarios are discussed, can both spontaneously recover its original planar state through regulation. 24-fold 4.4-fold variations in small-scale demonstrated, respectively, for 5 °C rise 1 drop bimaterial. This work opens avenues dynamic modulation, large tuning range is worthy expectation.