With the development of technology, in smaller and smaller length scale, emerging non-diffusive heat transfer has been challenging the traditional Fouriers law of heat conduction. Consequently, lots of models have been constructed. In this paper, a novel two-parameter non-diffusive heat conduction (TPHC) model was applied to decode the physics in nanoscale transient grating experiments. Better fitting with the experiment was shown in the numerical simulation and newly discovered collective diffusive effect was observed by this TPHC model.

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