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Journal Articles Physical Review Applied Year : 2019

Experimental demonstration of three-photon Coherent Population Trapping in an ion cloud

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Abstract

A novel protocol of interrogation based on coherent population trapping in an N-level scheme atomic system leads to dark resonances involving three different photons. An ensemble of several hundreds of radio-frequency trapped Ca+ ions is probed by three lasers simultaneously locked onto the same optical frequency comb, resulting in high-contrast spectral lines referenced to an atomic transition in the THz domain. We discuss the cause of uncertainties and limitations for this method and show that reaching a sub-kHz resolution is experimentally accessible via this interrogation protocol.
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Dates and versions

hal-02064988 , version 1 (12-03-2019)
hal-02064988 , version 2 (19-06-2019)

Identifiers

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Mathieu Collombon, Cyril Chatou, Gaétan Hagel, Jofre Pedregosa-Gutierrez, Marie Houssin, et al.. Experimental demonstration of three-photon Coherent Population Trapping in an ion cloud. Physical Review Applied, 2019, 12, pp.034035. ⟨10.1103/PhysRevApplied.12.034035⟩. ⟨hal-02064988v2⟩
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