Attosecond quantum-beat spectroscopy in helium

Niranjan Shivaram; Xiao Min Tong; Henry Timmers; Arvinder Sandhu

doi:10.1088/0953-4075/49/5/055601

Attosecond quantum-beat spectroscopy in helium

Niranjan Shivaram, Xiao Min Tong, Henry Timmers, Arvinder Sandhu

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The evolution of electron wavepackets determines the course of many physical and chemical phenomena, and attosecond spectroscopy aims to measure and control such dynamics in real time. Here, we investigate radial electron wavepacket motion in helium by using an XUV attosecond pulse train to prepare a coherent superposition of excited states and a delayed femtosecond IR pulse to ionize them. Quantum-beat signals observed in the high resolution photoelectron spectrogram allow us to follow the field-free evolution of the bound electron wavepacket and determine the time-dependent ionization dynamics of the low-lying 2p state.

Original language	English (US)
Article number	055601
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	49
Issue number	5
DOIs	https://doi.org/10.1088/0953-4075/49/5/055601
State	Published - Feb 9 2016

Keywords

attosecond
femtosecond
helium
photoelectron
quantum beat
wavepacket

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1088/0953-4075/49/5/055601

Cite this

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title = "Attosecond quantum-beat spectroscopy in helium",

abstract = "The evolution of electron wavepackets determines the course of many physical and chemical phenomena, and attosecond spectroscopy aims to measure and control such dynamics in real time. Here, we investigate radial electron wavepacket motion in helium by using an XUV attosecond pulse train to prepare a coherent superposition of excited states and a delayed femtosecond IR pulse to ionize them. Quantum-beat signals observed in the high resolution photoelectron spectrogram allow us to follow the field-free evolution of the bound electron wavepacket and determine the time-dependent ionization dynamics of the low-lying 2p state.",

keywords = "attosecond, femtosecond, helium, photoelectron, quantum beat, wavepacket",

author = "Niranjan Shivaram and Tong, {Xiao Min} and Henry Timmers and Arvinder Sandhu",

note = "Funding Information: This work was supported by the National Science Foundation (NSF) under contract PHY-1505556. XMT was supported by a Grant-in-Aid for Scientific Research (C24540421) from the Japan Society for the Promotion of Science and the HAPACS (Highly Accelerated Parallel Advanced System for Computational Sciences) Project for advanced interdisciplinary computational sciences by exascale computing technology. Publisher Copyright: {\textcopyright} 2016 IOP Publishing Ltd.",

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AU - Shivaram, Niranjan

AU - Tong, Xiao Min

AU - Timmers, Henry

AU - Sandhu, Arvinder

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PY - 2016/2/9

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N2 - The evolution of electron wavepackets determines the course of many physical and chemical phenomena, and attosecond spectroscopy aims to measure and control such dynamics in real time. Here, we investigate radial electron wavepacket motion in helium by using an XUV attosecond pulse train to prepare a coherent superposition of excited states and a delayed femtosecond IR pulse to ionize them. Quantum-beat signals observed in the high resolution photoelectron spectrogram allow us to follow the field-free evolution of the bound electron wavepacket and determine the time-dependent ionization dynamics of the low-lying 2p state.

AB - The evolution of electron wavepackets determines the course of many physical and chemical phenomena, and attosecond spectroscopy aims to measure and control such dynamics in real time. Here, we investigate radial electron wavepacket motion in helium by using an XUV attosecond pulse train to prepare a coherent superposition of excited states and a delayed femtosecond IR pulse to ionize them. Quantum-beat signals observed in the high resolution photoelectron spectrogram allow us to follow the field-free evolution of the bound electron wavepacket and determine the time-dependent ionization dynamics of the low-lying 2p state.

KW - attosecond

KW - femtosecond

KW - helium

KW - photoelectron

KW - quantum beat

KW - wavepacket

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Attosecond quantum-beat spectroscopy in helium

Abstract

Keywords

ASJC Scopus subject areas

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