Observation of ultra-narrow electromagnetically induced transparency and slow light using purely electronic spins in a hot atomic vaporF. Goldfarb1, J. Ghosh1, 2, M. David1, J. Ruggiero1, T. Chanelière1, J.-L. Le Gouët1, H. Gilles3, R. Ghosh2 and F. Bretenaker1
1 Laboratoire Aimé Cotton, CNRS-Université Paris Sud 11 - 91405 Orsay, France, EU
2 School of Physical Sciences, Jawaharlal Nehru University - New Delhi - 110 067, India
3 Centre de Recherche sur les Ions, les Matériaux et la Photonique - 6 boulevard du Maréchal Juin, 14050 Caen, France, EU
received 11 February 2008; accepted in final form 7 April 2008; published June 2008
published online 19 May 2008
Electromagnetically induced transparency (EIT) is observed in gaseous 4He at room temperature. Ultra-narrow (less than 10kHz) EIT windows are obtained for the first time for purely electronic spins in the presence of Doppler broadening. The positive role of collisions is emphasized through measurements of the power dependence of the EIT resonance. The measurement of slow light opens up possible ways to applications.
42.50.Gy - Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption.
42.25.Bs - Wave propagation, transmission and absorption.
42.50.Nn - Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media.
© EPLA 2008