Abstract
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 language | English |
|---|---|
| Pages (from-to) | 729-733 |
| Number of pages | 5 |
| Journal | Nano Letters |
| Volume | 11 |
| Issue number | 2 |
| DOIs | |
| State | Published - 9 Feb 2011 |
Keywords
- heterodyne spectroscopy
- Lamb-Dicke regime
- matter-wave tunneling
- optical lattice
- resonance fluorescence
- Single-atom spectrum