Efficient photo-ionization for barium ion trapping using a dipole-allowed resonant two-photon transition

G. Leschhorn, T. Hasegawa, T. Schaetz

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Two efficient and isotope-selective resonant two-photon ionization techniques for loading barium ions into radio-frequency (RF)-traps are demonstrated. The scheme of using the strong dipole-allowed transition 6s 21S 0→6s6p∈ 1P 1 at λ=553 nm as a first step towards ionization is compared to the established technique of using a weak inter-combination line (6s 21S 0→5d6p∈ 3D 1,λ=413 nm). An increase of two orders of magnitude in the ionization efficiency is found favoring the transition at 553 nm. This technique can be implemented using commercial all-solid-state laser systems and is expected to be advantageous compared to other narrowband photo-ionization schemes of barium in cases where highest efficiency and isotope-selectivity are required.

Original languageEnglish
Pages (from-to)159-165
Number of pages7
JournalApplied Physics B: Lasers and Optics
Issue number1
Publication statusPublished - 2012 Jul 1


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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