摘要
A controllable electromagnetically induced grating (EIG) is experimentally realized in a coherent rubidium ensemble with 5S1/2-5P3/2-5D5/2 cascade configuration.In our work,a whole picture de-scribing the relation between the first-order diffraction efficiency and the power of the coupling field is experimentally presented for the first time,which agrees well with the theoretical prediction.More important,by fine tuning the experimental parameters,the first-order diffraction efficient of as high as 25% can be achieved and a clear three-order diffraction pattern is also observed.Such a controllable periodic structure can provide a powerful tool for studying the control of light dynamics,pave the way for realizing new optical device.
基金
This work was supported by the National Key R & D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grant Nos. 61575116, 61875112, 61705122, 61728502, 91736209, and 11434007)
Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (Grant No. IRT 17R70)
the Program for Sanjin Scholars of Shanxi Province, Applied Basic Research Project of Shanxi Province (No. 201701D221004)
Key Research and Development Program of Shanxi Province for International Cooperation (201803D421034)
111 project (Grant No. D18001)
the Fund for Shanxi “1331 Project” Key Subjects Construction.
