Tunneling-induced spectral broadening of a single atom in a three-dimensional optical lattice

Wookrae Kim, Changwon Park, Jung Ryul Kim, Youngwoon Choi, Sungsam Kang, Sooin Lim, Yea Lee Lee, Jisoon Ihm, Kyungwon An

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We have investigated the spectral broadening in the near-resonance fluorescence spectrum of a single rubidium atom trapped in a three-dimensional (3D) optical lattice in a strong Lamb-Dicke regime. Besides the strong Rayleigh peak, the spectrum exhibited weak Stokes and anti-Stokes Raman sidebands. The line width of the Rayleigh peak for low potential depths was well explained by matter-wave tunneling between the first-two lowest vibrational states of 3D anisotropic harmonic potentials of adjacent local minima of the optical lattice.

Original languageEnglish
Pages (from-to)729-733
Number of pages5
JournalNano Letters
Issue number2
Publication statusPublished - 2011 Feb 9


  • Lamb-Dicke regime
  • Single-atom spectrum
  • heterodyne spectroscopy
  • matter-wave tunneling
  • optical lattice
  • resonance fluorescence

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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