Resolving Rydberg-Electron Recapture Dynamics via Laser-driven Frustrated Tunneling Ionization

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Bibliographic Details
Main Authors:	Peng, Sainan, Chen, Yudong, Li, Yang, Fan, Guangyu, Xie, Xinhua, He, Feng, Tao, Zhensheng
Format:	Preprint
Published:	2025
Subjects:	Optics
Online Access:	Acceder al recurso
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author	Peng, Sainan Chen, Yudong Li, Yang Fan, Guangyu Xie, Xinhua He, Feng Tao, Zhensheng
author_facet	Peng, Sainan Chen, Yudong Li, Yang Fan, Guangyu Xie, Xinhua He, Feng Tao, Zhensheng
contents	By employing two-color counter-rotating circularly polarized laser fields, we investigate the dynamics of electron recapture into Rydberg states under strong, ultrashort laser pulses, probed via coherent extreme-ultraviolet free-induction decay (XFID). Our study reveals significant distinctions between XFID and above-threshold high-order harmonic generation in terms of their ellipticity dependence on the driving-laser waveforms, yield variations with the laser-intensity ratios, and sensitivity to the driving-laser ellipticity. All these differences arise from the fundamentally distinct electron trajectories underlying the two processes. More importantly, our findings provide compelling evidence that Rydberg-electron recapture predominantly occurs at the end of the driving laser field, offering the first direct experimental confirmation of this long-proposed mechanism.
format	Preprint
id	arxiv_https___arxiv_org_abs_2502_19007
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Resolving Rydberg-Electron Recapture Dynamics via Laser-driven Frustrated Tunneling Ionization Peng, Sainan Chen, Yudong Li, Yang Fan, Guangyu Xie, Xinhua He, Feng Tao, Zhensheng Optics By employing two-color counter-rotating circularly polarized laser fields, we investigate the dynamics of electron recapture into Rydberg states under strong, ultrashort laser pulses, probed via coherent extreme-ultraviolet free-induction decay (XFID). Our study reveals significant distinctions between XFID and above-threshold high-order harmonic generation in terms of their ellipticity dependence on the driving-laser waveforms, yield variations with the laser-intensity ratios, and sensitivity to the driving-laser ellipticity. All these differences arise from the fundamentally distinct electron trajectories underlying the two processes. More importantly, our findings provide compelling evidence that Rydberg-electron recapture predominantly occurs at the end of the driving laser field, offering the first direct experimental confirmation of this long-proposed mechanism.
title	Resolving Rydberg-Electron Recapture Dynamics via Laser-driven Frustrated Tunneling Ionization
topic	Optics
url	https://arxiv.org/abs/2502.19007

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