Two-Center Interference in the Photoionization Delays of 
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Heck, Saijoscha; Han, Meng; Jelovina, Denis; Ji, Jia-Bao; Perry, Conaill; Gong, Xiaochun; Lucchese, Robert R.; Ueda, Kiyoshi; Wörner, Hans Jakob

doi:10.1103/physrevlett.129.133002

Cited by 15 publications

(15 citation statements)

References 44 publications

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“…We make a comparison with the previous RABBITT simulations on H 2 [39] and confirm validity of our interpretation and accuracy of our numerical results. We also demonstrate a strong dependence of the time delay on the molecular axis orientation discovered earlier in the H + 2 ion [40,41] and the Kr 2 dimer [15].…”

supporting

confidence: 73%

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XUV ionization of the H₂ molecule studied with attosecond angular streaking

Serov¹,

Kheifets²

2023

J. Phys. B: At. Mol. Opt. Phys.

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We study orientation and two-center interference eﬀects in attosecond time-resolved photoionization of the H2molecule. Time resolution of XUV ionization of H2 is gained through the phase retrieval capability of attosecond angular streaking demonstrated earlier by Kheifets et al [[Phys. Rev. A 106, 033106 (2022)]. Once applied to H2 , this technique delivers an anisotropic phase and time delay which both depend sensitively on the molecular axis orientation. In addition, the photoelectron momentum distribution displays a very clear two-center interference pattern. When the interference formula of Walter and Briggs [J. Phys. B 32 2487 (1999)] is applied, an eﬀective photoelectron momentum appears to be greater than the asymptotic momentum at the detector. This eﬀect is explained by a molecular potential well surrounding the photoemission center.

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supporting

confidence: 73%

“…CH 3 I molecule was conducted by Biswas et al [14]. Heck et al [15] presented the experimental observation of two-center interference in the ionization time delays of Kr 2 . Wang et al [16] explored the role of nuclear-electronic coupling in attosecond photoionization of H 2 .…”

mentioning

confidence: 99%

XUV ionization of the H₂ molecule studied with attosecond angular streaking

Serov¹,

Kheifets²

2023

J. Phys. B: At. Mol. Opt. Phys.

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“…For photoemission from diatomic molecules, the constructive and destructive interference between the wave packets emitted or scattered from the two atoms leads to a modulation of the photoionization time delay depending on the photoelectron energy. [101][102][103] In this scenario, the nuclear motion during bond softening also leads to a substantial effect on the photoionization time delay, [104] which has been measured recently. [105] Generally speaking, attosecond electron dynamics is an important topic in ultrafast science and its study has led to a variety of novel findings.…”

Section: Recent Advancesmentioning

confidence: 89%

Attosecond ionization time delays in strong-field physics

Ma 马,

Ni 倪,

Wu 吴

2024

Chinese Phys. B

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Electronic processes within atoms and molecules reside on the timescale of attoseconds. Recent advances in the laser-based pump-probe interrogation techniques have made possible the temporal resolution of ultrafast electronic processes on the attosecond timescale, including photoionization and tunneling ionization. These interrogation techniques include the attosecond streak camera, the reconstruction of attosecond beating by interference of two-photon transitions, and the attoclock. While the former two are usually employed to study photoionization processes, the latter is typically used to investigate tunneling ionization. In this Topical Review, we briefly overview these timing techniques towards an attosecond temporal resolution of ionization processes in atoms and molecules under intense laser fields. In particular, we review the backpropagation method, which is a novel hybrid quantum-classical approach towards full characterization of tunneling ionization dynamics. Continued advances in the interrogation techniques promise to pave the pathway towards the exploration of ever faster dynamical processes on an ever shorter timescale.

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“…Moreover, the CC delays are generally similar in magnitude to the photoionization delays for the commonly used 800-nm dressing fields, such that they cannot be neglected for any quantitative purpose ( 25 , 27 ). The compromise adopted in most studies to date consists of measuring the difference in the photoionization delays between different species of atomic energy shells ( 2 , 3 ), molecular ionic states ( 15 , 28 ), or species with very similar ionization energies ( 18 , 19 ), to minimize the contributions of the CC delays. With the pioneering addition of angular resolution, the difference in the CC delays between different partial waves has also been determined ( 29 ) and the photoionization delays have been separated into their different angular momentum components, under the assumption that the CC delays were universal and equal to the asymptotic approximation ( 30 ).…”

Section: Introductionmentioning

confidence: 99%

“…Although photoionization dynamics have been measured in atoms (2,3,(8)(9)(10)(11)(12), molecules (13)(14)(15)(16)(17), clusters (18,19), solids (20)(21)(22), and liquids (23), no experiment could so far directly access the delays that are truly associated with one-photon ionization (24,25). Instead, all previously applied techniques leave an indelible, measurementinduced mark on the experimentally determined delays, which is referred to as Coulomb-laser-coupling or continuum-continuum (CC) delay (4,6).…”

Section: Introductionmentioning

confidence: 99%

Separation of photoionization and measurement-induced delays

Han,

Ji,

Leung

et al. 2024

Sci. Adv.

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Photoionization of matter is one of the fastest electronic processes in nature. Experimental measurements of photoionization dynamics have become possible through attosecond metrology. However, all experiments reported to date contain a so-far unavoidable measurement-induced contribution, known as continuum-continuum (CC) or Coulomb-laser-coupling delay. In traditional attosecond metrology, this contribution is nonadditive for most systems and nontrivial to calculate. Here, we introduce the concept of mirror symmetry–broken attosecond interferometry, which enables the direct and separate measurement of both the native one-photon ionization delays and the CC delays. Our technique solves the longstanding challenge of experimentally isolating these two contributions. This advance opens the door to the next generation of accurate measurements and precision tests that will set standards for benchmarking the accuracy of electronic structure and electron-dynamics methods.

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Two-Center Interference in the Photoionization Delays of Kr2

Cited by 15 publications

References 44 publications

XUV ionization of the H₂ molecule studied with attosecond angular streaking

XUV ionization of the H₂ molecule studied with attosecond angular streaking

Attosecond ionization time delays in strong-field physics

Separation of photoionization and measurement-induced delays

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Two-Center Interference in the Photoionization Delays of Kr2

Cited by 15 publications

References 44 publications

XUV ionization of the H2 molecule studied with attosecond angular streaking

XUV ionization of the H2 molecule studied with attosecond angular streaking

Attosecond ionization time delays in strong-field physics

Separation of photoionization and measurement-induced delays

Contact Info

Product

Resources

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XUV ionization of the H₂ molecule studied with attosecond angular streaking

XUV ionization of the H₂ molecule studied with attosecond angular streaking