Measurement of ac-Stark shift by a two-photon dressing process via four-wave mixing
Department of Physics, University of Arkansas - Fayetteville, AR 72701, USA
2 Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University Xi'an 710049, China
Accepted: 4 January 2011
By setting laser beams in two-photon Doppler-free configurations for both cascade and Λ-type subsystems in a four-level inverted-Y system, a four-wave mixing (FWM) process is studied and optimized within the Doppler profile. The two-photon ac-Stark effect in the FWM signal is observed, which can be used to determine the energy level shift of the atom due to dressing fields.
PACS: 32.80.Qk – Coherent control of atomic interactions with photons / 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 42.65.-k – Nonlinear optics
© EPLA, 2011