A5011702677- Laser-Matter Interactions and Applications
- Spectroscopy and Quantum Chemical Studies
- Advanced Chemical Physics Studies
- Mass Spectrometry Techniques and Applications
- Advanced Frequency and Time Standards
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Fluorescence Microscopy Techniques
East China Normal University
2021-2025
Attosecond chronoscopy is central to the understanding of ultrafast electron dynamics in matter from gas condensed phase with attosecond temporal resolution. It has, however, not yet been possible determine timing individual partial waves, and steering their contribution has a substantial challenge. Here, we develop polarization-skewed serving as wave meter reveal role each angle-resolved photoionization shifts rare atoms. We steer relative ratio between different waves realize...
Abstract Partial wave analysis is key to interpretation of the photoionization atoms and molecules on attosecond timescale. Here we propose a heterodyne approach, based delay-resolved anisotropy parameters reveal role played by high-order partial waves during photoionization. This extends Reconstruction Attosecond Beating By Interference Two-photon Transitions technique into few-photon regime. We demonstrate that even for moderate ( ~ 1TW/cm 2 ) intensities, near-infrared-assisted helium...
Attosecond time-resolved electron tunneling dynamics have been investigated by using attosecond angular streaking spectroscopy, where a clock reference to the laser field vector is required in atomic strong-field ionization and situation becomes complicated molecules. Here we reveal resonant process via transient state developing an electron-tunneling-site-resolved molecular attoclock Ar-Kr^{+}. Two distinct deflection angles are observed photoelectron distribution frame, corresponding...
Multiphoton light-matter interactions invoke a so-called "black box" in which the experimental observations contain quantum interference between multiple pathways. Here, we employ polarization-controlled attosecond photoelectron metrology with partial wave manipulator to deduce pathway within this 'black for two-photon ionization of neon atoms. The angle-dependent and time-resolved spectra are measured across broad energy range. Two-photon phase shifts each reconstructed through...
Photoionization is one of the most fundamental processes in light–matter interaction. Advanced attosecond photoelectron spectroscopy provides possibility to characterize ultrafast photoemission process an extremely short time scale. Following scattering symmetry rules, residual ions encode photoionization prints at instant electron removal forming alternative emission chronoscope. Here, we experimentally illustrate ion reconstruction beating by interference two-photon transition...
Shape resonance is an important and ubiquitous phenomenon in the process of molecular scattering photoionization. The study attosecond photoemission time delay vicinity shape great significance for understanding its intrinsic origin on a nature scale electron motion. In this paper, advanced coincidence interferometer consisting near-infrared femtosecond light source extreme ultraviolet pulse train used to 4σ nitric oxide molecules via reconstructing harmonic beating by measuring interference...
Driven by intense laser fields, the outgoing photoelectrons in molecules possess a quiver motion, resulting rise of effective ionization potential. The coupling field-dressed potential with abundant molecular dynamics complicates laser-molecule interactions. Here, we demonstrate an approach to resolve photoelectron releasing order dissociative and non-dissociative channels multiphoton driven orthogonally polarized two-color femtosecond pulse. kinetic energy releases regular nodes angular...
Abstract Attosecond chronoscopy is central to the understanding of ultrafast electron dynamics from gas condensed phase with attosecond temporal resolution. It has, however, not yet been able determine timing individual partial waves, and steering their contribution has a substantial challenge. Here, we develop polarization-skewed reveal roles angle-resolved photoionization shifts in rare atoms. By scanning relative polarization angle between an extreme-ultraviolet pulse train phase-locked...