A semi-classical approach to two-frequency solitons in a three-level cascade atomic system

• Published in: Optics communications Vol. 274; no. 1; pp. 66 - 73
• Main Authors: Ansari, Nadeem A., Towers, I.N., Jovanoski, Z., Sidhu, H.S.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.2007; Elsevier Science
• Subjects: Atomic and molecular physics; Atomic properties and interactions with photons; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Nonlinear optics; Optical solitons; nonlinear guided waves; Optics; Photon interactions with atoms; Physics; Quantum optics; Strong-field excitation of optical transitions in quantum systems; multi-photon processes; dynamic stark shift; 42.65.−k; 42.65.Tg; 32.80.−t; Digital simulation; Optical solitons; Radiation matter interactions; Bright soliton; Grey solitons; 32.80.-t; Spatial soliton; Three level atom; Nonlinear media; High field; 42.65.-k; Nonlinear optics
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2007.02.019

A semi-classical theory of two intense optical fields interacting with a third-order non-linear medium composed of a three-level cascade atomic system is presented. It is predicted that non-linear atom-field interactions allow the formation of two-frequency bright, dark and grey spatial solitons. We demonstrate through numerical simulations and analytic stability analysis that the bright and grey solitons are stable.