Low-light-level four-wave mixing by quantum interference

Chang Kai Chiu, Yi Hsin Chen, Yen Chun Chen, Ite A. Yu, Ying Cheng Chen, Yong Fan Chen

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We observed electromagnetically induced transparency-based four-wave mixing (FWM) in the pulsed regime at low light levels. The FWM conversion efficiency of 3.8(9)% was observed in a four-level system of cold 87Rb atoms using a driving laser pulse with a peak intensity of ≈80 μW/cm2, corresponding to an energy of ≈60 photons per atomic cross section. Comparison between the experimental data and the theoretical predictions proposed by Harris and Hau [Phys. Rev. Lett. 82, 4611 (1999)PRLTAO0031-900710.1103/PhysRevLett.82.4611] showed good agreement. Additionally, a high conversion efficiency of 46(2)% was demonstrated when applying this scheme using a driving laser intensity of ≈1.8 mW/cm2. According to our theoretical predictions, this FWM scheme can achieve a conversion efficiency of nearly 100% when using a dense medium with an optical depth of 500.

Original languageEnglish
Article number023839
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume89
Issue number2
DOIs
Publication statusPublished - 2014 Feb 24

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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