Abstract
For the first time, we experimentally and theoretically research about the probe transmission signal (PTS), the reflected four wave mixing band gap signal(FWM BGS) and fluorescence signal (FLS) under the double dressing effect in an inverted Y-type four level system. FWM BGS results from photonic band gap structure. We demonstrate that the characteristics of PTS, FWM BGS and FLS can be controlled by power, phase and the frequency detuning of the dressing beams. It is observed in our experiment that FWM BGS switches from suppression to enhancement, corresponding to the switch from transmission enhancement to absorption enhancement in the PTS with changing the relative phase. We also observe the relation among the three signals, which satisfy the law of conservation of energy. Such scheme could have potential applications in optical diodes, amplifiers and quantum information processing.
Highlights
Four-wave mixing (FWM) is a nonlinear optical effect that generates light with different frequencies and different quantum properties
Under electromagnetically induced transparency (EIT) conditions FWM signals can be allowed to transmit through the atomic medium and the fluorescence induced by spontaneous emission can be generated [7,8,9,10]
We investigate the optical response of hot rubidium (85Rb) atoms driven by a stationary standing wave (SW) coupling field and probe field, from which the photonic band gap (PBG) structure and four wave mixing band gap signal (FWM BGS) and probe transmission signal (PTS) can be obtained
Summary
Four-wave mixing (FWM) is a nonlinear optical effect that generates light with different frequencies and different quantum properties. Such EIG has a potential use in all optical switching [15], manipulation of light propagation to create a tunable photonic band gap [16, 17].This research can be used to make optical diodes. We investigate the optical response of hot rubidium (85Rb) atoms driven by a stationary SW coupling field and probe field, from which the PBG structure and four wave mixing band gap signal (FWM BGS) and probe transmission signal (PTS) can be obtained. Optical response of medium is examined by resorting to a set of nonlinear coupled wave equations, which is a powerful tool [20,21,22,23] for describing the nonlinear interaction of light fields in such a dressed medium and are here used to test the validity of the experiment result
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
