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Study of a four-level system in vee plus ladder configuration

Bharti, Vineet and Natarajan, Vasant (2015) Study of a four-level system in vee plus ladder configuration. In: OPTICS COMMUNICATIONS, 356 . pp. 510-514.

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Official URL: http://dx.doi.org/10.1016/j.optcom.2015.08.042


We present the results of a theoretical study of a four-level atomic system in vee + ladder configuration using a density matrix analysis. The absorption and dispersion profiles are derived for a weak probe field and for varying strengths of the two strong control fields. For specificity, we choose energy levels of Rb-87, and present results for both stationary atoms and moving atoms in room temperature vapor. An electromagnetically induced absorption (EIA) peak with negative dispersion is observed at zero probe de-tuning when the control fields have equal strengths, which switches to electromagnetically induced transparency (ET) with positive dispersion (due to splitting of the EIA peak) when the control fields are unequal. There is significant linewidth narrowing in thermal vapor. (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Keywords: Electromagnetically induced absorption; Four-level system; Coherent control
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 05 Nov 2015 06:01
Last Modified: 05 Nov 2015 06:01
URI: http://eprints.iisc.ac.in/id/eprint/52667

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