Gouy Phase-Related Effects in the Free-Space Optical Modulation of Free Electrons
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866909875396673536 |
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| author | Zhao, Zhexin Fang, Yiqi Uludağ, Mevlana Yunus Hommelhoff, Peter |
| author_facet | Zhao, Zhexin Fang, Yiqi Uludağ, Mevlana Yunus Hommelhoff, Peter |
| contents | Modulating the free-electron wave function with light brings new opportunities to create attosecond electron pulse trains, to probe the quantum coherence of systems with significantly improved spatial resolution, and to generate classical and non-classical states of light with wide tunability. It is therefore crucial to efficiently generate free-electron wave functions that are suitable for these applications. In this study, we theoretically investigate an efficient free-space optical modulation of free electrons with two counter-propagating Gaussian beams. We find that the Gaussian beams' Gouy phase not only plays a crucial role in the interaction, but also enables straight-forward generation of valuable free-electron states, including comb-shape spectra with similar amplitudes, and states with high degree of coherence. We also discuss the feasibility of demonstrating these Gouy phase-related effects with chirped femto-second laser pulses. Our study establishes a theoretical foundation and physical intuition about the role of the Gouy phase. It can provide guidance to efficiently shape the free-electron wave function for a wide range of quantum applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_24939 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gouy Phase-Related Effects in the Free-Space Optical Modulation of Free Electrons Zhao, Zhexin Fang, Yiqi Uludağ, Mevlana Yunus Hommelhoff, Peter Optics Quantum Physics Modulating the free-electron wave function with light brings new opportunities to create attosecond electron pulse trains, to probe the quantum coherence of systems with significantly improved spatial resolution, and to generate classical and non-classical states of light with wide tunability. It is therefore crucial to efficiently generate free-electron wave functions that are suitable for these applications. In this study, we theoretically investigate an efficient free-space optical modulation of free electrons with two counter-propagating Gaussian beams. We find that the Gaussian beams' Gouy phase not only plays a crucial role in the interaction, but also enables straight-forward generation of valuable free-electron states, including comb-shape spectra with similar amplitudes, and states with high degree of coherence. We also discuss the feasibility of demonstrating these Gouy phase-related effects with chirped femto-second laser pulses. Our study establishes a theoretical foundation and physical intuition about the role of the Gouy phase. It can provide guidance to efficiently shape the free-electron wave function for a wide range of quantum applications. |
| title | Gouy Phase-Related Effects in the Free-Space Optical Modulation of Free Electrons |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2510.24939 |