fig1

Figure 1. (A) The one-dimensional simulation unit in this work, abstracted from the layered model schematically shown in (B). While the thermal response of the single layer is represented by the temperature variation at the inner side of the first layer [indicated by the red arrow in (A)], the thermal response of the double-layer structure is represented by the temperature at the inner side of the second layer [indicated by the blue arrow in (A)].