Physics – Atomic Physics
Scientific paper
2012-02-21
Phys. Rev. A 85, 043401 (2012)
Physics
Atomic Physics
6 pages, 6 figures
Scientific paper
Efficient self-interference of single-photons emitted by a sideband-cooled Barium ion is demonstrated. First, the technical tools for performing efficient coupling to the quadrupolar transition of a single $^{138}$Ba$^{+}$ ion are presented. We show efficient Rabi oscillations of the internal state of the ion using a highly stabilized 1.76 $\mu m$ fiber laser resonant with the S$_{1/2}$-D$_{5/2}$ transition. We then show sideband cooling of the ion's motional modes and use it as a means to enhance the interference contrast of the ion with its mirror-image to up to 90%. Last, we measure the dependence of the self-interference contrast on the mean phonon number, thereby demonstrating the potential of the set-up for single-atom thermometry close to the motional ground state.
Blatt Rainer
Gerber Scott S.
Hennrich Markus
Hetet Gabriel
Kumph Muir
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