Observation and measurement of an extra phase shift created by optically detuned light storage in metastable helium

Abstract

Electromagnetically induced transparency (EIT) in metastable helium at room temperature is experimentally shown to exhibit light storage capabilities for intermediate values of the detuning between the coupling and probe beams and the center of the atomic Doppler profiles. An additional phase shift is shown to be imposed to the retrieved pulse of light when the EIT protocol is performed at non-zero optical detunings. The value of this phase shift is measured for different optical detunings between 0 and 2 GHz, and its origin is discussed.

6 pages, 5 figures

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Cited by in corpus (2)

• Time-dependent phase shift of a retrieved pulse in off-resonant EIT-based light storage
• Light storage in a room temperature atomic vapor based on coherent population oscillations