ac Stark effect in a doubly driven three-level atom

Changjiang Wei, Dieter Suter, Andrew S. M. Windsor, and Neil B. Manson
Phys. Rev. A 58, 2310 – Published 1 September 1998
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Abstract

In this paper we present a detailed treatment of the ac Stark effect of a three-level atom driven by two strong laser fields in a cascade scheme. We consider two situations where there is a weak laser field probing a new transition starting from one of the three levels to a fourth level. In one case the initial level of the probed transition is the ground state and in the other case the initial level is the intermediate state. For both situations we derive an analytical expression for the absorptive and dispersive responses of the weak probe field and present the spectrum obtained from numerical calculation. The general feature of the spectrum has a three-peak structure. The positions and relative intensities of the three spectral components are affected strongly by the driving field intensities and detunings. An account of the spectrum is given in terms of the dressed-state formalism.

  • Received 19 March 1998

DOI:https://doi.org/10.1103/PhysRevA.58.2310

©1998 American Physical Society

Authors & Affiliations

Changjiang Wei1,2, Dieter Suter2, Andrew S. M. Windsor1, and Neil B. Manson1

  • 1Laser Physics Center, The Australian National University, Canberra, ACT 0200, Australia
  • 2Fachbereich Physik, University of Dortmund, Dortmund 44221, Germany

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Vol. 58, Iss. 3 — September 1998

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