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Study Reveals Virtual Charges Key to Ultrafast Optics

9/29/2025

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Summary

Story summary

Politecnico di Milano's study, published in Nature Photonics, shows virtual charges are essential to predict ultrafast optical responses in insulating materials and involved collaboration with the University of Tsukuba and the Max Planck Institute.
Researchers used attosecond-scale transient reflection spectroscopy on monocrystalline diamonds.
The findings identify virtual carrier excitation as a key mechanism for optical responses in solids.

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Story summary

Politecnico di Milano's study, published in Nature Photonics, shows virtual charges are essential to predict ultrafast optical responses in insulating materials and involved collaboration with the University of Tsukuba and the Max Planck Institute.
Researchers used attosecond-scale transient reflection spectroscopy on monocrystalline diamonds.
The findings identify virtual carrier excitation as a key mechanism for optical responses in solids.