Optical lamb-dicke confinement of a Ba+ mono-ion oscillator
Abstract
We demonstrate the confinement of a single laser cooled Ba+ ion, held in a radiofrequency trap, to a region of space whose linear dimensions are much less than the wavelength of the interrogating light divided by 2π (Lamb-Dicke regime1). This is the condition for the complete freedom from first order Doppler shifts. From the absence of observable Doppler sidebands on a narrow, two-photon feature in the spectrum of Ba+, we infer an upper bound on the ion orbit radius of 165 nm. This is the first clear demonstration of Lamb-Dicke confinement in the visible.2
- Publication:
-
Advances in Laser Science-I
- Pub Date:
- August 1986
- DOI:
- 10.1063/1.35754
- Bibcode:
- 1986AIPC..146..401N
- Keywords:
-
- 32.80.Pj;
- Optical cooling of atoms;
- trapping