Storage by trapping and spatial staggering of multiple interacting solitons inΛ-type media

Abstract

In this paper we investigate the properties of self induced transparency (SIT) solitons, propagating in a Λ-type medium. We find that the interaction between SIT solitons can lead to trapping with their phase preserved in the ground state coherence of the medium. These phases can be altered in a systematic way by the application of appropriate light fields, such as additional SIT solitons. Furthermore, multiple independent SIT solitons can be made to propagate as bi-solitons through their mutual interaction with a separate light field. Finally, we demonstrate that control of the SIT soliton phase can be used to implement an optical exclusive-or gate.

Femtosecond nanometer-sized optical solitons

“…The dependence of the main properties of the quasisoliton for laterally constant Rabi frequencies on just one parameter, namely, the induced group index n SIT , indicates that the results should be valid for three-dimensional waveguides, although the simulations were performed for a two-dimensional structure. A generalization to multilevel SIT could pave the way to a practical realization of applications such as parametric amplification [27], optical memories [28,29], or amplitude and polarization-dependent collisions [30] of nanoscopic confined optical solitons in, e.g., erbium-doped or gas-filled low-index-core fibers [31][32][33].…”