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arXiv · 2412.05922

Heat Generation in Spatially Confined Solids Through Electronic Light Scattering

Sergey Kharintsev·Elina Battalova
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Abstract

In this Letter, we study the optical heating of spatially dispersive solids due to electronic light scattering (ELS), a phenomenon driven by indirect optical transitions. In this process, a spatial heterogeneity generates an optical near-field photon with expanded momentum, leading to electron-photon momentum matching, followed by thermalization of the electron system promoting optical heating. We experimentally demonstrate this effect by melting spatially confined semiconductor (Si) and metal (Au) under continuous-wave laser pump within the transparency window. ELS is a dominant physical process in media with strong spatial dispersion, underlying a variety of thermo-optical applications.

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Sergey Kharintsev, Elina Battalova. 2024-12-08. Heat Generation in Spatially Confined Solids Through Electronic Light Scattering. https://arxiv.org/abs/2412.05922

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