Resonant emission in four-wave mixing for a cycling transition F_g = 1 ↔ F_e = 0

Abstract

Four-wave mixing (FWM) in a cycling transition F_g =1 ↔ F_e =0 is investigated. Subject to a linearly polarized pump field with frequency ω _c and a magnetic field, and simultaneously saturated and probed by the circularly polarized fields (σ _±) with frequencies ω _s and ω _p , three kinds of FWM fields with frequencies: 2ω _s − ω _p, ω _c+ω _s − ω _p and ω _c − ω _s+ω _p, emit. The multi-peaked structure of FWM spectra is obtained and explained as the resonant emission between the ‘virtual states’ in the dressed picture. The generated FMW signals have high quantum efficiency for a wide range of drive Rabi frequency and saturation Rabi frequency. Finally, the emitted fields ω _c + ω _s − ω _p and ω _c − ω _s+ω _p have about the same intensity for the well matching among the Zeeman splitting, drive Rabi frequency and saturation Rabi frequency.

Acknowledgments

This work is supported by the National Key Basic Research Special Foundation (NKBRSF) under grant No. TG1999075207, the National Natural Science Foundation of China under grant Nos 10334010, 10304001, 10521002, 10434020, 60378012, 90206003, 10328407 and 90101027. We thank Professor H.B. Jiang, Professors J.S. Zhang and K. Wang for the helpful discussions.