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Chinese Physics Letters

Dicke-Narrowing Spectroscopy of Doubly Dressed Electromagnetically Induced Transparency and Singly Dressed Four-Wave-Mixing in a Confined Atomic System

Yuanyuan Li, Jintao Bai, Li-Li Li-Li, Zhang Wei-Feng, Li Chang-Biao, Nie Zhi-Qiang, Gan Chen-Li, Zhang Yan-Peng

Published Sep 1, 2008• 5 citations
Publisher

Abstract

Dicke-narrowing effect appears both in doubly dressed electromagnetically induced transparency and singly dressed four-wave-mixing lines due to the contribution of slow atoms resulting from de-excited effects of atom-wall collision and transient behaviour of atoms in a confined system. A robust recipe for high resolution spectroscopy of electromagnetically induced transparency dressed by two fields and four-wave-mixing lines comparable with the cold atoms is achievable in a thin vapour cell in experiments.

DOI
10.1088/0256-307x/25/9/039

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Dicke-narrowing effect appears both in doubly dressed electromagnetically induced transparency and singly dressed four-wave-mixing lines due to the contribution of slow atoms resulting from de-excited effects of atom-wall collision and transient behaviour of atoms in a confined system. A robust recipe for high resolution spectroscopy of electromagnetically induced transparency dressed by two fields and four-wave-mixing lines comparable with the cold atoms is achievable in a thin vapour cell in experiments.
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We experimentally compare the probe transmission, four-wave mixing (FWM) and fluorescence signals under dressing effects for the first time. Especially, the interplay between two ladder subsystems is investigated in the Y -type atomic system. Moreover, the two-photon fluorescence signal with ultra-narrow linewidth is obtained, which is much narrower than the Doppler-free electromagnetically induced transparency window. Such fluorescence with very high coherence and monochromaticity can be potentially applied in metrology and quantum correlation.
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