Subnatural linewidth for probe absorption in an electromagnetically-induced-transparency medium due to Doppler averaging

Iftiquar, SM and Karve, GR and Natarajan, Vasant (2008) Subnatural linewidth for probe absorption in an electromagnetically-induced-transparency medium due to Doppler averaging. In: Physical Review A, 77 (6). 063807-1-063807-5.

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Abstract

We obtain subnatural linewidth (i.e., $<\Gamma$) for probe absorption in room-temperature Rb vapor using electromagnetically induced transparency (EIT) in a \Lambda system. For stationary atoms, the EIT dip for a resonant control laser is roughly one-half as wide as the control Rabi frequency $\Omega_c$. But in thermal vapor, the moving atoms fill the transparency band so that the final EIT dip remains subnatural even when $\Omega _c \gg \Gamma$. We observe a linewidth of $\Gamma /4$ for $\Omega _c = 8\Gamma$ in the $D_2$ line of Rb.

Item Type:	Journal Article
Publication:	Physical Review A
Publisher:	American Physical Society
Additional Information:	Copyright of this article belongs to American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	29 Jul 2008
Last Modified:	19 Sep 2010 04:48
URI:	http://eprints.iisc.ac.in/id/eprint/15341

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