Picture of two heads

Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Phase-dependent interaction in a four-level atomic configuration

Morigi, Giovanna and Franke-Arnold, Sonja and Oppo, Gian-Luca (2002) Phase-dependent interaction in a four-level atomic configuration. Physical Review A, 66 (5). 053409/1-053409/9. ISSN 1094-1622

[img]
Preview
PDF (strathprints006169.pdf)
strathprints006169.pdf

Download (382kB) | Preview

Abstract

We study a four-level atomic scheme interacting with four lasers in a closed-loop configuration with a ⋄ (diamond) geometry. We investigate the influence of the laser phases on the steady state. We show that, depending on the phases and the decay characteristic, the system can exhibit a variety of behaviors, including population inversion and complete depletion of an atomic state. We explain the phenomena in terms of multiphoton interference, and compare our results with the phase-dependent phenomena in the double-Λ scheme. This investigation may be useful for developing nonlinear optical devices, and for the spectroscopy and laser cooling of alkali-earth atoms.