Amplification on dark transitions in a driven three-level atom

Ficek, Z., Swain, S. and Akram, U. (2001) Amplification on dark transitions in a driven three-level atom. Journal of Physics B-atomic Molecular And Optical Physics, 34 4: 671-680. doi:10.1088/0953-4075/34/4/315


Author Ficek, Z.
Swain, S.
Akram, U.
Title Amplification on dark transitions in a driven three-level atom
Journal name Journal of Physics B-atomic Molecular And Optical Physics   Check publisher's open access policy
ISSN 0953-4075
Publication date 2001-01-01
Sub-type Article (original research)
DOI 10.1088/0953-4075/34/4/315
Open Access Status
Volume 34
Issue 4
Start page 671
End page 680
Total pages 10
Editor K. Burnett
Place of publication United Kingdom
Publisher Institute of Physics Publishing
Language eng
Subject C1
240301 Atomic and Molecular Physics
780102 Physical sciences
Abstract We study a three-level atomic system of the vee type, but driven on only one transition by a monochromatic laser. It is shown that the gain of a probe beam, recently predicted for this system by Menon and Agarwal (Menon S and Agarwal G 2000 Phys. Rev. A 61 13 807), is due to an unexpected amplification on a completely inverted, nondecaying (dark) transition. This prediction violates the well known balance condition between the population inversion and the coupling strength of the probe field to the inverted transition, which requires that the coupling strength reduces with increasing population inversion. We show that the condition may be violated only if the probe field selectively couples to just one of the atomic transitions: when it couples to both transitions, the balance condition is satisfied and the system is transparent for the probe field coupled to the dark transitions. No amplification is possible in the latter case.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Inhibited Spontaneous Emission
Quantum Interference
Resonance Fluorescence
Population-inversion
3-level Atom
Absorption
System
Laser
Field
Band
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Wed, 15 Aug 2007, 02:01:41 EST