Volume 105, Number 4, February 2014
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||05 March 2014|
Observation and measurement of an extra phase shift created by optically detuned light storage in metastable helium
1 Laboratoire Aimé Cotton, CNRS - Université Paris Sud 11 - ENS Cachan - 91405 Orsay Cedex, France
2 School of Physical Sciences, Jawaharlal Nehru University - New Delhi 110067, India
3 School of Natural Sciences, Shiv Nadar University - Gautam Budh Nagar, UP 203207, India
Received: 15 December 2013
Accepted: 12 February 2014
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.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 42.50.Ex – Optical implementations of quantum information processing and transfer / 42.50.Md – Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency
© EPLA, 2014
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