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PreprintarXiv licencearXiv

Nonthermal nonlinear many-body excitonic dynamics in high-purity silicon

  • Patrick Pilch
  • Siyu Duan
  • Yang Liu
  • Manfred Bayer
  • Marc Assmann
  • Zhe Wang
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Abstract

We report time-resolved optical pump-terahertz third-harmonic generation spectroscopy of picosecond nonthermal many-body charge dynamics in high-purity silicon at room temperature. Although in thermal equilibrium excitons in silicon are unstable due to a lower binding energy than the thermal energy at room temperature, following pulsed non-resonant optical pumping we can identify the formation of transient excitonic states on the picosecond time scale in our high-resolution nonlinear spectroscopic measurements. In contrast to unbound electron-hole pairs, the nonthermal many-body excitonic dynamics feature a characteristic time-dependent evolution, a distinct dependence on charge density, and a nonperturbative nonlinear terahertz response.

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Cite

BibTeXRIS
BibTeX
@misc{pilch2026nonthermal,
  title = {{Nonthermal nonlinear many-body excitonic dynamics in high-purity silicon}},
  author = {Patrick Pilch and Siyu Duan and Yang Liu and Manfred Bayer and Marc Assmann and Zhe Wang},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.06016},
  eprint = {2610.06016},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.06016},
}
RIS
TY  - UNPB
TI  - Nonthermal nonlinear many-body excitonic dynamics in high-purity silicon
AU  - Patrick Pilch
AU  - Siyu Duan
AU  - Yang Liu
AU  - Manfred Bayer
AU  - Marc Assmann
AU  - Zhe Wang
PY  - 2026
DA  - 2026/10/05
PB  - arXiv
DO  - 10.48550/arxiv.2610.06016
UR  - https://arxiv.org/abs/2610.06016
AB  - We report time-resolved optical pump-terahertz third-harmonic generation spectroscopy of picosecond nonthermal many-body charge dynamics in high-purity silicon at room temperature. Although in thermal equilibrium excitons in silicon are unstable due to a lower binding energy than the thermal energy at room temperature, following pulsed non-resonant optical pumping we can identify the formation of transient excitonic states on the picosecond time scale in our high-resolution nonlinear spectroscopic measurements. In contrast to unbound electron-hole pairs, the nonthermal many-body excitonic dynamics feature a characteristic time-dependent evolution, a distinct dependence on charge density, and a nonperturbative nonlinear terahertz response.
ER  -