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Journal Articles Physical Review Applied Year : 2023

Accelerating the Heat Diffusion: Fast Thermal Relaxation of a Microcantilever

Abstract

In most systems, thermal diffusion is intrinsically slow with respect to mechanical relaxation. We devise here a generic approach to accelerate the relaxation of the temperature field of a 1D object, in order to beat the mechanical time scales. This approach is applied to a micro-meter sized silicon cantilever, locally heated by a laser beam. A tailored driving protocol for the laser power is derived to quickly reach the thermal stationary state. The model is implemented experimentally yielding a significant acceleration of the thermal relaxation, up to a factor 30. An excellent agreement with the theoretical predictions is reported. This strategy allows a thermal steady state to be reached significantly faster than the natural mechanical relaxation.
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licence : CC BY - Attribution
licence : CC BY - Attribution
licence : CC BY - Attribution
licence : CC BY - Attribution
licence : CC BY - Attribution

Dates and versions

hal-04041907 , version 1 (22-03-2023)

Identifiers

Cite

Basile Pottier, Ludovic Bellon, Carlos Plata, Emmanuel Trizac, David Guéry-Odelin. Accelerating the Heat Diffusion: Fast Thermal Relaxation of a Microcantilever. Physical Review Applied, 2023, 19 (3), pp.034072. ⟨10.1103/PhysRevApplied.19.034072⟩. ⟨hal-04041907⟩
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