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In this work we investigate the interaction of laser fields with atomic three-level quantum system in a lambda type configuration and four-level quantum system in tripod and Y type configurations. The numerical simulations are done based on the density matrix approach using coupled optical Bloch equations. Shifting in the EIT window is observed with respect to population distribution in the ground state atomic levels. The line-width of the EIT window is tuned by varying coupling field for different configurations. This mechanism allows controlling the dark resonances and manipulating the probe absorption and dispersion properties. The results may provide a suitable reference for the switching between subluminal and superluminal light propagation.

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Tuning the Electromagnetically Induced Transparency in Three Level and Four Level Atomic Systems

  • 会议论文

  • 发表日期：

    2025年

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  • V. Priyadarshini,
  • Nandhana Chishor,
  • Phalgun Tomar,
  • Jianping Hu,
  • M. Ummal Momeen

摘要

In this work we investigate the interaction of laser fields with atomic three-level quantum system in a lambda type configuration and four-level quantum system in tripod and Y type configurations. The numerical simulations are done based on the density matrix approach using coupled optical Bloch equations. Shifting in the EIT window is observed with respect to population distribution in the ground state atomic levels. The line-width of the EIT window is tuned by varying coupling field for different configurations. This mechanism allows controlling the dark resonances and manipulating the probe absorption and dispersion properties. The results may provide a suitable reference for the switching between subluminal and superluminal light propagation.