Observation of large Kerr nonlinearity at low light intensities

被引：426

作者：

Kang, HS ^{[1
]}

Zhu, YF ^{[1
]}

机构：

[1] Florida Int Univ, Dept Phys, Miami, FL 33199 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.91.093601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report an experimental observation of large Kerr nonlinearity with vanishing linear susceptibilities in coherently prepared four-level rubidium atoms. Quantum coherence and interference manifested by electromagnetically induced transparency suppress the linear susceptibilities and greatly enhance the nonlinear susceptibilities at low light intensities. The measured Kerr nonlinearity is comparable in magnitude to the linear dispersion in a simple two-level system and is several orders of magnitude greater than the Kerr nonlinearity of a conventional three-level scheme under similar conditions.

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页数：4

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