Attosecond quantum-beat spectroscopy in helium

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 languageEnglish (US)
Article number055601
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume49
Issue number5
DOIs
StatePublished - Feb 9 2016

Fingerprint

synchronism
helium
spectroscopy
dynamic control
electrons
spectrograms
pulses
photoelectrons
ionization
high resolution
excitation

Keywords

  • attosecond
  • femtosecond
  • helium
  • photoelectron
  • quantum beat
  • wavepacket

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Attosecond quantum-beat spectroscopy in helium. / Shivaram, Niranjan; Tong, Xiao Min; Timmers, Henry; Sandhu, Arvinder Singh.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 49, No. 5, 055601, 09.02.2016.

Research output: Contribution to journalArticle

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