The Kerr Nonlinearity in an N-Type Four-Level System via Spontaneously Generated Coherence | Zendy

Yingjie Du | Zendy; Kang Jin | Zendy; Junxiang Zhang | Zendy

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The Kerr Nonlinearity in an N-Type Four-Level System via Spontaneously Generated Coherence

Author(s) -

Yingjie Du,

Kang Jin,

Junxiang Zhang

Publication year - 2009

Publication title -

journal of atomic molecular and optical physics

Language(s) - English

Resource type - Journals

eISSN - 1687-9236

pISSN - 1687-9228

DOI - 10.1155/2009/382764

Subject(s) - degenerate energy levels , coherence (philosophical gambling strategy) , nonlinear system , kerr effect , physics , atomic system , type (biology) , atomic coherence , field (mathematics) , quantum mechanics , optics , mathematics , laser , ecology , pure mathematics , biology

The Kerr nonlinearity is investigated in an N-type four-level atomic system whose both supper levels are degenerated or nearly degenerate. It is found that the spontaneously generated coherence as a result of the degenerate levels can change the Kerr nonlinearity dramatically depending on the angle between two spontaneous channels. In addition, we discover that the probe field makes its own contribution to the nonlinearity in comparison to indifference in general three-level systems.

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