Realistic theory of electromagnetically-induced transparency and slow light in a hot vapor of atoms undergoing collisions

Abstract

We present a realistic theoretical treatment of a three-level $\Lambda$ system in a hot atomic vapor interacting with a coupling and a probe field of arbitrary strengths, leading to electromagnetically-induced transparency and slow light under the two-photon resonance condition. We take into account all the relevant decoherence processes including col5Blisions. Velocity-changing collisions (VCCs) are modeled in the strong collision limit effectively, which helps in achieving optical pumping by the coupling beam across the entire Doppler profile. The steady-state expressions for the atomic density-matrix elements are numerically evaluated to yield the experimentally measured response characteristics. The predictions, taking into account a dynamic rate of influx of atoms in the two lower levels of the $\Lambda$, are in excellent agreement with the reported experimental results for ${}^4$He*. The role played by the VCC parameter is seen to be distinct from that by the transit time or Raman coherence decay rate.

References in corpus (5)

• Diffusion-induced Ramsey narrowing
• On decoherence of electromagnetically-induced transparency in atomic vapor
• Theory of Thermal Motion in Electromagnetically Induced Transparency: Diffusion, Doppler, Dicke and Ramsey
• Observation of Ultra-narrow Electromagnetically Induced Transparency and Slow Light using Purely Electronic Spins in a Hot Atomic Vapor
• Comparison of 87Rb N-resonances for D1 and D2 transitions

Cited by in corpus (12)

• Coherent Diffusion of Polaritons in Atomic Media
• Interacting double dark resonances in a hot atomic vapor of helium
• Electromagnetically Induced Transparency in $\Lambda$-systems of ${}^{87}Rb$ atom in magnetic field
• Resolution of hyperfine transitions in metastable 83Kr using Electromagnetically Induced Transparency
• Observation of Electromagnetically Induced Transparency and Slow Light in the Dark State - Bright State Basis of CPT
• Observation and measurement of an extra phase shift created by optically detuned light storage in metastable helium
• Spin noise spectroscopy of optical light shifts
• Light storage in a room temperature atomic vapor based on coherent population oscillations
• Time-dependent phase shift of a retrieved pulse in off-resonant EIT-based light storage
• Derivation of CPT resonance signals from density-matrix equations with all relevant sublevels of Cs atoms and confirmation of experimental results
• Effect of Closely-Spaced Excited States on Electromagnetically Induced Transparency
• Paraxial fluid of light in hot atomic vapors