• Switching from sub- to superluminal light in a Y-type atomic system using wavelength mismatching

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      https://www.ias.ac.in/article/fulltext/pram/093/06/0098

    • Keywords

       

      Sub- and superluminal light propagation; wavelength mismatching; group index; optical switching

    • Abstract

       

      We study the optical properties of a four-level Y system theoretically in $^{87}\rm{Rb}$ atoms using density matrix formalism. On account of wavelength mismatching effects in the system transparency window splits and enhanced absorption regions are observed on either side of the line centre. This enhanced absorption is associated with anomalous dispersion resulting in superluminal light propagation. We also explore the dressed state analysis in the system. The effect of mismatching factor on the group index and group velocity is discussed.

    • Author Affiliations

       

      KAVITA YADAV1 AJAY WASAN1

      1. Department of Physics, Indian Institute of Technology, Roorkee 247 667, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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