title: Electromagnetically induced transparency from a single atom in free space.
abstract: In this Letter, we report an absorption spectroscopy experiment and the observation of electromagnetically induced transparency from a single trapped atom. We focus a weak and narrow band Gaussian light beam onto an optically cooled 138Ba+ ion using a high numerical aperture lens. Extinction of this beam is observed with measured values of up to 1.35%. We demonstrate electromagnetically induced transparency of the ion by tuning a strong control beam over a two-photon resonance in a three-level Λ-type system. The probe beam extinction is inhibited by more than 75% due to population trapping.
authors.affiliation: Institute for Experimental Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
authors.forename: L
authors.initials: L
authors.lastname: Slodička
authors.forename: G
authors.initials: G
authors.lastname: Hétet
authors.forename: S
authors.initials: S
authors.lastname: Gerber
authors.forename: M
authors.initials: M
authors.lastname: Hennrich
authors.forename: R
authors.initials: R
authors.lastname: Blatt