Vol. 43, Issue 3, pp. 471-484

  1. Archive
  2. Optica Applicata Vol. 43, Issue 3, pp. 471-484 (2013)
Vol. 43 Issue 3 pp. 471-484

Electromagnetically induced transparency in systems with degenerate autoionizing levels in Λ-configuration

Thuan Bui Dinh, Wieslaw Leonski, Van Cao Long, Jan Perina Jr.

Keywords

electromagnetically induced transparency, electromagnetically induced transparency (EIT), lambda configuration, autoionizing states, double Fano profile

Abstract

We discuss a Λ-like model of atomic levels involving two autoionizing (AI) states of the same energy. The system is irradiated by two external electromagnetic fields (strong – driving and weak – probing). For such a system containing degenerate AI levels we derive the analytical formula describing the medium susceptibility. We show that the presence of the second AI level leads to the additional electromagnetically induced transparency (EIT) window appearance. We show that the characteristics of this window can be manipulated by changes of the parameters describing the interactions of AI levels with other ones. This is a new mechanism which leads to additional transparency windows in EIT model, that differs from the mechanism where a bigger number of Zeeman sublevels is taken into account.

Vol. 43
Issue 3
pp. 471-484

2.52 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology