• Le Thi Minh Phuong Saigon University, Viet Nam
  • Dinh Xuan Khoa Vinh University, Viet Nam
  • Nguyen Huy Bang Vinh University, Viet Nam
  • Thai Doan Thanh Ho Chi Minh City University of Food Industry, Viet Nam
  • Nguyen Tuan Anh Ho Chi Minh City University of Food Industry, Viet Nam
  • Nguyen Thi Thu Hien Ho Chi Minh City University of Food Industry, Viet Nam
  • Hoang Minh Dong Ho Chi Minh City University of Food Industry, Viet Nam




Analytical solution, Electromagnetically induced transparency, External magnetic field, Optical bistability.


We investigate the behavior of optical bistability in a degenerate two-level atomic medium using an external magnetic field to separate the lower level into two distinct levels that both connect to an upper level by the probe and coupling laser fields. Based on analytical solutions, the absorption spectrum and behavior of optical bistability in an electromagnetically induced transparency regime under an external magnetic field are investigated. By controlling the external magnetic field, we find that the appearance and disappearance of the optical bistability can be easily controlled according to the strength of the magnetic field in the transparent window domain. Furthermore, the effects of the intensity of the coupling laser field and the parameters of the system on the behavior of optical bistability are also considered. The proposed model is useful for applications in all-optical switches and magneto-optic storage devices.


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Volume and Issues


Natural Sciences and Technology

How to Cite

Phuong, L. T. M., Khoa, D. X., Bang, N. H., Thanh, T. D., Anh, N. T., Hien, N. T. T., & Dong, H. M. (2021). OPTICAL BISTABILITY IN A DEGENERATE TWO-LEVEL EIT MEDIUM UNDER THE INFLUENCE OF AN EXTERNAL MAGNETIC FIELD: AN ANALYTICAL APPROACH. Dalat University Journal of Science, 11(4), 13-24. https://doi.org/10.37569/DalatUniversity.11.4.872(2021)