تقرير
Ultrafast Kapitza-Dirac effect
| العنوان: | Ultrafast Kapitza-Dirac effect |
|---|---|
| المؤلفون: | Lin, Kang, Eckart, Sebastian, Liang, Hao, Hartung, Alexander, Jacob, Sina, Ji, Qinying, Schmidt, Lothar Ph. H., Schöffler, Markus S., Jahnke, Till, Kunitski, Maksim, Dörner, Reinhard |
| المصدر: | Science 2024 |
| سنة النشر: | 2024 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Physics - Atomic Physics |
| الوصف: | Similar to the optical diffraction of light passing through a material grating, the Kapitza-Dirac effect occurs when an electron is diffracted by a standing light wave. In its original description the effect is time-independent. In the present work, we extend the Kapitza-Dirac concept to the time domain. By tracking the spatiotemporal evolution of a pulsed electron wave packet diffracted by a femtosecond (10 15 second) standing wave pulse in a pump-probe scheme, we observe so far unseen time-dependent diffraction patterns. The fringe spacing in the observed pattern differs from that generated by the conventional Kapitza-Dirac effect, moreover it decreases as the pump-probe delay time increases. By exploiting this time-resolved diffraction scheme, we gather access to the time evolution of the previously inaccessible phase properties of a free electron. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1126/science.adn1555 |
| URL الوصول: | http://arxiv.org/abs/2404.00304 |
| رقم الأكسشن: | edsarx.2404.00304 |
| قاعدة البيانات: | arXiv |
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