V-type electromagnetically induced transparency and the slow light phenomenon in room-temperature cesium vapor

We investigate electromagnetically induced transparency (EIT) in a V-type configuration using room-temperature cesium vapor. The probe and control beams operating at wavelengths ∼ 852 nm are derived from the same laser, preserving the phase coherence between them, and are tuned to the 6S_1/2(F = 4) → 6P_3/2(F’ = 4) and 6S_1/2(F = 4) → 6P_3/2(F’ = 5) hyperfine transitions. We perform direct pulse delay measurements to investigate the group velocity of the probe pulses traveling through the medium and its characteristics with control laser intensity. This study provides both theoretical and experimental insights into the slow-light phenomenon in V-type cesium systems, offering potential applications in optical delay lines and quantum memory development.