We experimentally report on the evolution from singly-dressed to doubly-dressed four-wave mixing （FWM） process by controlling the powers of the probe, the pump and the dressing fields respectively. The differences i...We experimentally report on the evolution from singly-dressed to doubly-dressed four-wave mixing （FWM） process by controlling the powers of the probe, the pump and the dressing fields respectively. The differences in the enhancement and the suppression of FWM signal between the two-level and cascade three-level atomic systems are observed and explained by the multi-dressed effect theoretically. Both the x direction and the y direction spatial splittings of the degenerate-FWM （DWFM） beams are obtained. We also investigate the switch between the enhancement and the suppression of the DWFM signals and between its spatial splittings in x direction and y direction. The spatial splittings in x direction and y direction can be controlled by the relative position and the intensity of the involved laser beams. Such a study can be useful for optimizing the efficiency of the FWM process and providing potential applications in spatial signal processing.展开更多
We illustrate our experimental observation of the periodic changes of spatial splitting of the generated four-wave mixing(FWM)signal induced by different polarization states of one of the dressing beams.It is pointed ...We illustrate our experimental observation of the periodic changes of spatial splitting of the generated four-wave mixing(FWM)signal induced by different polarization states of one of the dressing beams.It is pointed out that the changes of intensity of the dressing beam and the FWM signal have influences on the spatial splitting and their influences compete with each other.The differences between p-and s-polarized FWM beams are demonstrated.The influences of the dressing beams,which lead to the larger spatial splitting with different polarization states or frequency detuning,are observed as well.展开更多
We experimentally investigate the interplay between two coexisting six-wave mixing(SWM)signals and the interference between coexisting four-wave mixing(FWM)and SWM signals in a five-level atomic system of85 Rb.When tw...We experimentally investigate the interplay between two coexisting six-wave mixing(SWM)signals and the interference between coexisting four-wave mixing(FWM)and SWM signals in a five-level atomic system of85 Rb.When two electromagnetically induced transparency windows gradually overlap in frequency,the competition between these two SWM signals arises.Moreover,we report the experimental result which shows that the temporal interference with femtosecond time scales between FWM and SWM signals.展开更多
基金supported by the 973 Program of China (Grant No.2012CB921804)the National Natural Science Foundation of China (Grant Nos.10974151,61078002,61078020,11104214,61108017,and 11104216)+1 种基金the New Century Excellent Talent Project of the Ministry of Education of China (Grant No.08-0431)the Interdisciplinary Project of Xi’an Jiaotong University,China (Grant Nos.xjj20100100 and xjj20100151)
文摘We experimentally report on the evolution from singly-dressed to doubly-dressed four-wave mixing （FWM） process by controlling the powers of the probe, the pump and the dressing fields respectively. The differences in the enhancement and the suppression of FWM signal between the two-level and cascade three-level atomic systems are observed and explained by the multi-dressed effect theoretically. Both the x direction and the y direction spatial splittings of the degenerate-FWM （DWFM） beams are obtained. We also investigate the switch between the enhancement and the suppression of the DWFM signals and between its spatial splittings in x direction and y direction. The spatial splittings in x direction and y direction can be controlled by the relative position and the intensity of the involved laser beams. Such a study can be useful for optimizing the efficiency of the FWM process and providing potential applications in spatial signal processing.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10974151,61078002 and 61078020the New Century Excellent Talent Project of the Ministry of Education of China under Grant No 08-0431the Cross-Disciplinary Project of Xi’an Jiaotong University under Grant Nos 2009xjtujc08,xjj20100100 and xjj20100151.
文摘We illustrate our experimental observation of the periodic changes of spatial splitting of the generated four-wave mixing(FWM)signal induced by different polarization states of one of the dressing beams.It is pointed out that the changes of intensity of the dressing beam and the FWM signal have influences on the spatial splitting and their influences compete with each other.The differences between p-and s-polarized FWM beams are demonstrated.The influences of the dressing beams,which lead to the larger spatial splitting with different polarization states or frequency detuning,are observed as well.
基金Supported by the National Natural Science Foundation of China under Grant No 10974151,61078002 and 61078020the New Century Excellent Talent Project of the Ministry of Education of China under Grant No 08-0431the Cross-Disciplinary Project of Xi’an Jiaotong University under Grant Nos 2009xjtujc08,XJJ20100100 and XJJ20100151.
文摘We experimentally investigate the interplay between two coexisting six-wave mixing(SWM)signals and the interference between coexisting four-wave mixing(FWM)and SWM signals in a five-level atomic system of85 Rb.When two electromagnetically induced transparency windows gradually overlap in frequency,the competition between these two SWM signals arises.Moreover,we report the experimental result which shows that the temporal interference with femtosecond time scales between FWM and SWM signals.
