Efficient reflection via four-wave mixing in a Doppler-free electromagnetically-induced-transparency gas system

Hai Tao Zhou*, Da Wei Wang, Dan Wang, Jun Xiang Zhang, Shi Yao ZHU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

We experimentally demonstrate the high-efficiency reflection of a probe field in Λ-type three-level atoms of cesium vapor driven by two counterpropagating coupling fields. More than 60% of reflection efficiency is observed at the phase-matching angle. The underlying mechanism theoretically is investigated as the four-wave mixing is enhanced by the electromagnetically- induced transparency. Both of the two Doppler-free two-photon resonances (one for the probe and co-propagating fields, the other for the reflected and the counterpropagation fields) play an important role in satisfying the phase matching in the reflection direction. The phase compensation due to the anomalous dispersion and the decrease of effective absorption length in the atomic system allow the efficient reflection to be observed in a wide range of incident angles of the probe field and detunings of the coupling field.

Original languageEnglish
Article number053835
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number5
DOIs
Publication statusPublished - 17 Nov 2011

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics

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