Controllable electromagnetically induced grating in a cascade-type atomic system

• Published in: Frontiers of physics 2019-10, Vol.14 (5), p.52603, Article 52603
• Main Authors: Yuan, Jin-Peng, Wu, Chao-Hua, Li, Yi-Hong, Wang, Li-Rong, Zhang, Yun, Xiao, Lian-Tuan, Jia, Suo-Tang
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Atomic; coherent optical effects; Condensed Matter Physics; Controllability; Diffraction efficiency; diffraction gratings; Diffraction patterns; Efficiency; Lasers; Molecular; multiphoton processes; Optical and Plasma Physics; Optics; Particle and Nuclear Physics; Periodic structures; Physics; Physics and Astronomy; Power; Propagation; Research Article; Rubidium; Semiconductors; Spectrum analysis
• ISSN: 2095-0462; 2095-0470
• DOI: 10.1007/s11467-019-0924-1

A controllable electromagnetically induced grating (EIG) is experimentally realized in a coherent rubidium ensemble with 5 S 1/2-5 P 3/2-5 D 5/2 cascade configuration. In our work, a whole picture describing 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 efficiency 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.