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Heat generation in spatially confined solids through electronic light scattering.
Sergey S Kharintsev1, Elina I Battalova1
1Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kremlevskaya Str., 16a, Kazan, 420008, Russia.
Nanophotonics (Berlin, Germany)
|July 21, 2025
Summary
Electronic light scattering (ELS) causes optical heating in solids via indirect transitions. This phenomenon, demonstrated in silicon and gold, leads to material melting under moderate laser intensity, revealing ELS as a key thermo-optical mechanism.
Area of Science:
- Solid-state physics
- Optics
- Materials science
Background:
- Explores optical heating in spatially dispersive solids.
- Focuses on electronic light scattering (ELS) driven by indirect optical transitions.
- Highlights the role of light-induced spatial heterogeneity in photon momentum expansion.
Discussion:
- ELS involves broadband inelastic emission, akin to Compton scattering of visible photons.
- Electron system thermalization follows ELS, leading to material heating and melting.
- Demonstrates optical melting of silicon (semiconductor) and gold (metal) using moderate continuous-wave laser intensities (MW/cm²).
Key Insights:
- ELS is identified as the dominant mechanism for light interaction with spatially dispersive media.
- The study validates ELS as a fundamental process in thermo-optical phenomena.
- Experimental evidence confirms ELS-induced melting under accessible laser conditions.
Outlook:
- ELS underpins various thermo-optical applications.
- Further research can explore ELS in different materials and configurations.
- Potential for novel laser-material processing techniques based on ELS.
Keywords:
electron-photon interactionelectronic light scatteringindirect transitionsnonlocal photonicsoptical heatingphoton momentumMore Related Videos
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