Single atom as a mirror of an optical cavity |
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Authors: | Hétet G Slodi?ka L Hennrich M Blatt R |
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Institution: | Institute for Experimental Physics, University of Innsbruck, Austria. |
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Abstract: | By tightly focusing a laser field onto a single cold ion trapped in front of a far-distant dielectric mirror, we could observe a quantum electrodynamic effect whereby the ion behaves as the optical mirror of a Fabry-Pérot cavity. We show that the amplitude of the laser field is significantly altered due to a modification of the electromagnetic mode structure around the atom in a novel regime in which the laser intensity is already changed by the atom alone. We propose a direct application of this system as a quantum memory for single photons. |
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