Distinct terahertz third-harmonic generation of many-body excitonic states
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915288159617024 |
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| author | Zhu, Changqing Reinold, Anneke Pilch, Patrick Kovalev, Sergey Heckötter, Julian Reiter, Doris Bayer, Manfred Assmann, Marc Wang, Zhe |
| author_facet | Zhu, Changqing Reinold, Anneke Pilch, Patrick Kovalev, Sergey Heckötter, Julian Reiter, Doris Bayer, Manfred Assmann, Marc Wang, Zhe |
| contents | The dynamics of an electron-hole plasma governed by strong Coulomb interaction is a challenging many-body problem.We report on experimental realization of electron-hole many-body states in the picosecond time scale, with tunable densities in a representative semiconductor Cu$_2$O. By using time-resolved optical-pump terahertz third-harmonic-generation spectroscopy, we study the nonlinear terahertz dynamical characteristics of the many-body electron-hole states. We find not only efficient and nonperturbative terahertz third-harmonic yield associated with the excitonic formation, but also a nonmonotonic dependence of the excitonic nonlinear response on the electron-hole density, reflecting the exciton dissociation at high charge density. Our results provide an efficient excitonic sensing of the far-from-equilibrium electron-hole many-body states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_09535 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Distinct terahertz third-harmonic generation of many-body excitonic states Zhu, Changqing Reinold, Anneke Pilch, Patrick Kovalev, Sergey Heckötter, Julian Reiter, Doris Bayer, Manfred Assmann, Marc Wang, Zhe Strongly Correlated Electrons Optics The dynamics of an electron-hole plasma governed by strong Coulomb interaction is a challenging many-body problem.We report on experimental realization of electron-hole many-body states in the picosecond time scale, with tunable densities in a representative semiconductor Cu$_2$O. By using time-resolved optical-pump terahertz third-harmonic-generation spectroscopy, we study the nonlinear terahertz dynamical characteristics of the many-body electron-hole states. We find not only efficient and nonperturbative terahertz third-harmonic yield associated with the excitonic formation, but also a nonmonotonic dependence of the excitonic nonlinear response on the electron-hole density, reflecting the exciton dissociation at high charge density. Our results provide an efficient excitonic sensing of the far-from-equilibrium electron-hole many-body states. |
| title | Distinct terahertz third-harmonic generation of many-body excitonic states |
| topic | Strongly Correlated Electrons Optics |
| url | https://arxiv.org/abs/2501.09535 |