In this work, we experimentally demonstrate an image information transfer between two channels by using slow light based on electromagnetically induced transparency(EIT) in a solid. The probe optical image is slowed d...In this work, we experimentally demonstrate an image information transfer between two channels by using slow light based on electromagnetically induced transparency(EIT) in a solid. The probe optical image is slowed due to steep dispersion induced by EIT. By applying an additional control field to an EIT-driven medium, the slowed image is transferred into two information channels. Image intensities between two information channels can be controlled by adjusting the intensities of the control fields. The similarity of output images is further analyzed. This image information transfer allows for manipulating images in a controlled fashion, and will be important in further information processing.展开更多
We study phase-conjugate six-wave mixing spectroscopy based on electromagnetically-induced-transparency in a Doppler-broadened folded four-level system.It is found that the six-wave mixing spectrum can be either Doppl...We study phase-conjugate six-wave mixing spectroscopy based on electromagnetically-induced-transparency in a Doppler-broadened folded four-level system.It is found that the six-wave mixing spectrum can be either Doppler-free or very broad,depending on whether the interference between the polarisations of atoms with different velocities is constructive or destructive.To obtain the Doppler-free six-wave mixing spectrum in the folded four-level system,the conditions are more stringent in comparison with those in the cascade and N-type four-level systems.This polarisation interference can be controlled in the presence of a strong coupling field.展开更多
In this paper,we propose and analyze an optical multi-wave mixing scheme for the generation of coherent light in a five-level atomic system in the context of electomagneticall induced transparency.A detailed semiclass...In this paper,we propose and analyze an optical multi-wave mixing scheme for the generation of coherent light in a five-level atomic system in the context of electomagneticall induced transparency.A detailed semiclassical study of the propagation of generated mixing and probe fields is demonstrated.The analytical dependence of the generated minxing field on the probe field and the respective detuning is predicted.Such a nonlinear optical process can be used for generating short-wavelength radiation at low pump intensities.展开更多
Using Schrodinger-Maxwell formalism, we propose and analyze an optical four-wave mixing (FWM) scheme for the generation of coherent light in a coherent six-level atomic medium based on dual electromagnetically induced...Using Schrodinger-Maxwell formalism, we propose and analyze an optical four-wave mixing (FWM) scheme for the generation of coherent light in a coherent six-level atomic medium based on dual electromagnetically induced transparency (EIT). We show that the significantly enhanced conversion efficiency enabled by ultraslow propagation of pump waves has no direct relationship with the single-photon detuning, which is different from the FWM with a single EIT. The most important feature is that our scheme is also capable of inhibiting and delaying the onset of the detrimental three-photon destructive interference that looks like a recent scheme [Phys. Rev. Lett. 91 (2003) 243902] andmay be used for generating short-wave-length coherent radiation.展开更多
The time-dependent four-wave mixing(FWM) is analyzed in a four-level double semiconductor quantum well. The results show that both the amplitude and the conversion efficiency of the FWM field are enhanced with increas...The time-dependent four-wave mixing(FWM) is analyzed in a four-level double semiconductor quantum well. The results show that both the amplitude and the conversion efficiency of the FWM field are enhanced with increasing the strength of two-photon Rabi frequency. Interestingly, when the one-photon detuning becomes stronger the control field corresponding to the maximum efficiency increases. Such a controlled enhanced FWM may be used to generate coherent short-wave length radiation, and it can have potential applications in quantum control and communications.展开更多
We show the enhancement and suppression of a six-wave mixing (SWM) signal in the electromagnetically induced transparency in a five-level 85 Rb atomic system.The results show the Autler-Townes splitting and the enhanc...We show the enhancement and suppression of a six-wave mixing (SWM) signal in the electromagnetically induced transparency in a five-level 85 Rb atomic system.The results show the Autler-Townes splitting and the enhancement or suppression of SWM,which are caused respectively by a self-dressing effect and by an external dressing effect in the presence of mutual dressing between two SWM signals.In addition,we observe the polarization dependence of the enhancement and suppression of the SWM signals.展开更多
This paper describes the spatial transmission of electromagnetically induced transparency and four-wave mixing signals in the photonic bandgap structure,which are modulated using the adjustable parameters of light fie...This paper describes the spatial transmission of electromagnetically induced transparency and four-wave mixing signals in the photonic bandgap structure,which are modulated using the adjustable parameters of light fields.The spatial transmission patterns of the relevant signals are experimentally investigated with respect to the optical nonlinear Kerr effect that occurs in the modulation process.The experimental results reveal the spatial transmission patterns of the probe transmission and the four-wave mixing signals,such as focusing,defocusing,shifting,and spatial splitting.This study explains how the tunable parameters of light fields and their interactions with each other can regulate the spatial transmission of the light fields by changing the refractive indices of media,which provides a new research perspective and a degree of experimental technology support for more efficient all-optical communications.展开更多
基金Project supported by the National Natural Science foundation of China （Grant Nos 10174096 and 10374113） and the National Program for Basic Research in China （Grant No 001CB309301）.
基金Project supported by the National Basic Research Program of China(Grant No.2011CB921603)the National Natural Science Foundation of China(Grant Nos.11374126,11347137,11204103,11404336,and 11204029)the Fund for Fostering Talents in Basic Science of the National Natural Science Foundation of China(Grant No.J1103202)
文摘In this work, we experimentally demonstrate an image information transfer between two channels by using slow light based on electromagnetically induced transparency(EIT) in a solid. The probe optical image is slowed due to steep dispersion induced by EIT. By applying an additional control field to an EIT-driven medium, the slowed image is transferred into two information channels. Image intensities between two information channels can be controlled by adjusting the intensities of the control fields. The similarity of output images is further analyzed. This image information transfer allows for manipulating images in a controlled fashion, and will be important in further information processing.
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 10774185,10974252,and 10674174)the National Program for Basic Research in China (Grant No. 2006CB921107)
文摘We study phase-conjugate six-wave mixing spectroscopy based on electromagnetically-induced-transparency in a Doppler-broadened folded four-level system.It is found that the six-wave mixing spectrum can be either Doppler-free or very broad,depending on whether the interference between the polarisations of atoms with different velocities is constructive or destructive.To obtain the Doppler-free six-wave mixing spectrum in the folded four-level system,the conditions are more stringent in comparison with those in the cascade and N-type four-level systems.This polarisation interference can be controlled in the presence of a strong coupling field.
基金The project supported by National Fundamental Research Program of China under Grant No.2001CB309310
National Natural Science Foundation of China under Grant Nos.90103026,10125419,and 10121503
文摘In this paper,we propose and analyze an optical multi-wave mixing scheme for the generation of coherent light in a five-level atomic system in the context of electomagneticall induced transparency.A detailed semiclassical study of the propagation of generated mixing and probe fields is demonstrated.The analytical dependence of the generated minxing field on the probe field and the respective detuning is predicted.Such a nonlinear optical process can be used for generating short-wavelength radiation at low pump intensities.
文摘Using Schrodinger-Maxwell formalism, we propose and analyze an optical four-wave mixing (FWM) scheme for the generation of coherent light in a coherent six-level atomic medium based on dual electromagnetically induced transparency (EIT). We show that the significantly enhanced conversion efficiency enabled by ultraslow propagation of pump waves has no direct relationship with the single-photon detuning, which is different from the FWM with a single EIT. The most important feature is that our scheme is also capable of inhibiting and delaying the onset of the detrimental three-photon destructive interference that looks like a recent scheme [Phys. Rev. Lett. 91 (2003) 243902] andmay be used for generating short-wave-length coherent radiation.
基金Project supported by the Program for Changjiang Scholars and Innovative Research Team in University,China(Grant No.IRT1080)the National Natural Science Foundation of China(Grant Nos.51272158,11374252,and 51372214)+4 种基金the Changjiang Scholar Incentive Program,China(Grant No.[2009]17)the Shanghai Nano Special Foundation,China(Grant No.11nm0502600)the Scientific Research Fund of Hunan Provincial Education Department,China(Grant No.12A140)the Science and Technology Foundation of Guizhou Province,China(Grant No.J20122314)the Hunan Provincial Innovation Foundation for Postgraduate,China(Grant No.CX2012B248)
文摘The time-dependent four-wave mixing(FWM) is analyzed in a four-level double semiconductor quantum well. The results show that both the amplitude and the conversion efficiency of the FWM field are enhanced with increasing the strength of two-photon Rabi frequency. Interestingly, when the one-photon detuning becomes stronger the control field corresponding to the maximum efficiency increases. Such a controlled enhanced FWM may be used to generate coherent short-wave length radiation, and it can have potential applications in quantum control and communications.
基金Project supported by the National Natural Science Foundation of China (Grant Nos.10974151,61078002,and 61078020)the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No.08-0431)the Cross-Disciplinary Project of Xi'an Jiaotong University,China (Grant Nos.2009xjtujc08,XJJ20100100,and XJJ20100151)
文摘We show the enhancement and suppression of a six-wave mixing (SWM) signal in the electromagnetically induced transparency in a five-level 85 Rb atomic system.The results show the Autler-Townes splitting and the enhancement or suppression of SWM,which are caused respectively by a self-dressing effect and by an external dressing effect in the presence of mutual dressing between two SWM signals.In addition,we observe the polarization dependence of the enhancement and suppression of the SWM signals.
基金Project supported by the National Natural Science Foundation of China （Grant Nos 60308002 and 60678005）, the Foundation for the Author of National Excellent Doctoral Dissertation of China （Grant No 200339）, the Foundation for Key Program of Ministry of Education,China （Grant No 105156）, the For Ying-Tong Education Foundation for Young Teachers in the Institutions of Higher Education of China （Grant No 101061） and the Specialized Research Pund for the Doctoral Program of Higher Education of China （Grant No 20050698017）.
基金Acknowledgements This work was supported by China Postdoctoral Science Foundation （Grant No, 2012M521773）, the National Natural Science Foundation of China （Grant Nos. 61308015, 61078002, 61078020, 11104214, and 61205112）, and Xi＇an Science and Technology Program （Grant Nos. CX12189WTL02 and CX12189WL03）.
基金Project supported by the National Natural Science Foundation of China(Grant No.61705182)the Natural Science Foundation of Shaanxi Province,China(Grant No.2017JQ6024)
文摘This paper describes the spatial transmission of electromagnetically induced transparency and four-wave mixing signals in the photonic bandgap structure,which are modulated using the adjustable parameters of light fields.The spatial transmission patterns of the relevant signals are experimentally investigated with respect to the optical nonlinear Kerr effect that occurs in the modulation process.The experimental results reveal the spatial transmission patterns of the probe transmission and the four-wave mixing signals,such as focusing,defocusing,shifting,and spatial splitting.This study explains how the tunable parameters of light fields and their interactions with each other can regulate the spatial transmission of the light fields by changing the refractive indices of media,which provides a new research perspective and a degree of experimental technology support for more efficient all-optical communications.
