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. © Copyright EPLA, 2014.

Rupamanjari Ghosh

SNU Management

Maynard M.-A.

Labidi T.

Mukhtar M.

Kumar S.

Bretenaker F.

Goldfarb F.

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Shiv Nadar University

We perform Electromagnetically Induced Transparency (EIT)-based storage in metastable helium at room temperature. An additional phase shift is shown to be imposed to the retrieved pulse when we detune the coupling and probe beams from the center of the Doppler profile. © 2014 Optical Society of America.

Frontiers in Optics, FiO 2014

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