Solvated electrons in polar liquids as epsilon-near-zero materials tunable in the terahertz frequency range
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866910972771303424 |
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| author | Runge, Matthias Woerner, Michael Bondar, Denys I. Elsaesser, Thomas |
| author_facet | Runge, Matthias Woerner, Michael Bondar, Denys I. Elsaesser, Thomas |
| contents | Electrons in polar liquids give rise to a polaron resonance at a terahertz (THz) frequency ν_0 depending on electron concentration. The impact of this resonance on light propagation is studied in experiments, where a femtosecond pump pulse generates electrons via multiphoton ionization and a THz probe pulse propagated through the excited sample is detected in a phase-resolved way. We observe a behavior characteristic for epsilon-near-zero (ENZ) materials with strongly modified phase and group velocities around ν_0, and a broadening of the THz pulse envelope below ν_0. Calculations based on a local-field approach reproduce the ENZ behavior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_22198 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Solvated electrons in polar liquids as epsilon-near-zero materials tunable in the terahertz frequency range Runge, Matthias Woerner, Michael Bondar, Denys I. Elsaesser, Thomas Chemical Physics Materials Science Electrons in polar liquids give rise to a polaron resonance at a terahertz (THz) frequency ν_0 depending on electron concentration. The impact of this resonance on light propagation is studied in experiments, where a femtosecond pump pulse generates electrons via multiphoton ionization and a THz probe pulse propagated through the excited sample is detected in a phase-resolved way. We observe a behavior characteristic for epsilon-near-zero (ENZ) materials with strongly modified phase and group velocities around ν_0, and a broadening of the THz pulse envelope below ν_0. Calculations based on a local-field approach reproduce the ENZ behavior. |
| title | Solvated electrons in polar liquids as epsilon-near-zero materials tunable in the terahertz frequency range |
| topic | Chemical Physics Materials Science |
| url | https://arxiv.org/abs/2505.22198 |