Optical properties of an inhomogeneously broadened ΛV-system with multiple excited states

Abstract

We present a theoretical model using a density matrix approach to show the influence of multiple excited states on the optical properties of an inhomogeneously broadened V-system of the Rb D2 line. These closely spaced multiple excited states cause asymmetry in absorption and dispersion profiles. We observe the reduced absorption profiles, due to dressed state interactions of the applied electromagnetic fields, which results the Mollow sideband-like transparency windows. In a room temperature vapor, we obtain a narrow enhanced absorption and steep positive dispersion at the line center when the strengths of control and pump fields are equal. Here, we show how the probe transmittance varies when it passes through the atomic medium. We also discuss the transient behavior of our system which agrees well with the corresponding absorption and dispersion profiles. This study has potential applications in controllability of group velocity, and for optical and quantum information processing.

Keywords:

• electromagnetically induced transparency
• Doppler-broadened system
• ΛV-system
• transient properties
• absorption and dispersion

Acknowledgements

PK is thankful to the Ministry of Human Resource Development (MHRD), India for the financial assistance.