Phys. Rev. Lett. 68, 1132–1135 (1992)Observation of normal-mode splitting for an atom in an optical cavityReceived 4 November 1991; published in the issue dated 24 February 1992 An investigation of the spectral response of a small collection of two-state atoms strongly coupled to the field of a high-finesse optical resonator is described for mean number N¯≤10 atoms. For weak excitation, a coupling-induced normal-mode splitting is observed even for one intracavity atom, representing a direct spectroscopic measurement of the so-called vacuum Rabi splitting for the atom-cavity system. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.68.1132
DOI:
10.1103/PhysRevLett.68.1132
PACS:
42.50.Fx, 32.80.-t, 42.65.Pc
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