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acoustic phonons 1grain boundaries 1nanocrystalline silicon 1phonon scattering 1ultrafast spectroscopy 1

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physics.optics2026

Dynamics of confined acoustic phonon modes in nanocrystalline silicon membranes

Tiago E. C. Magalhães, Tiago E. C. Magalhães, Tânia M. Ribeiro +5

The authors use femtosecond time‑resolved pump‑probe spectroscopy to measure confined acoustic phonons in free‑standing nanocrystalline silicon membranes and show that grain bounda…