Enhancement of nonlinear susceptibility in a four-level tripod scheme

• 来源期刊: 中国光学快报(英文版)
• 学科: 工学
• 关键词: 非线性增强 四级 三脚架 敏感性 非线性极化率 微波场 原子系统 相互作用
• 年，卷（期）: 2010,（8）
• 所属期刊栏目: Nonlinear Optics
• 页码范围: 795-799
• 页数: 5页
• 分类号: TB853.9 TN304.5
• 语种: 英文

摘要

We propose a scheme for the enhancement of nonlinear susceptibility in a four-level tripod-type atomic system in the presence of a microwave field.With a microwave field,nonlinear susceptibility can be enhanced. Nonlinearity can also be ulteriorly enhanced by controlling the coupling field under the optimal intensity of the microwave field.The physical mechanism of the obtained giant nonlinear susceptibility is mainly based on interactions between microwave field and coupling fields.We present a physical understanding of our numerical results using a dressed-state approach and an analytical explanation.