EIT enhanced self-Kerr nonlinearity in the three-level lambda system under Doppler broadening


  • Dinh Xuan Khoa
  • Le Van Doai
  • Pham Van Trong
  • Tran Manh Cuong
  • Vu Ngoc Sau
  • Nguyen Huy Bang Vinh University
  • Le Nguyen Mai Anh Nong Lam University, Thu Duc district, Ho Chi Minh City, Vietnam




Kerr nonlinearity, atomic coherence, electromagnetically induced transparency


Using density-matrix theory, an analytical expression of the self-Kerr nonlinear coefficient of a three-level lambda EIT medium for a weak probe light is derived. Influences of the coupling light and Doppler broadening on the self-Kerr coefficient are investigated and compared to experimental observation with a good agreement. The self-Kerr nonlinearity is basically modified and greatly enhanced in the spectral region corresponding to EIT transparent window. Furthermore, sign, slope, and magnitude of the self-Kerr coefficient can be controlled with frequency and intensity of the coupling light and temperature. Such controllable Kerr nonlinearity can find interesting applications in optoelectronic devices working with low-light intensity.


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Author Biography

Dinh Xuan Khoa

Vinh University, Vinh city, Nghe An, Vietnam


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How to Cite

Khoa, D. X., Doai, L. V., Trong, P. V., Cuong, T. M., Sau, V. N., Bang, N. H., & Anh, L. N. M. (2014). EIT enhanced self-Kerr nonlinearity in the three-level lambda system under Doppler broadening. Communications in Physics, 24(3), 217. https://doi.org/10.15625/0868-3166/24/3/3915




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