Controlling the group velocity in a five-level K

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• 作者：Dingan Han ; Yaguang Zeng ; Yanfeng Bai ; Hui Cao ; Weicheng Chen ; Chunqing Huang ; Hong Lu
• 刊名：Optics Communications
• 出版年：2008
• 出版时间：15 September 2008
• 年：2008
• 卷：281
• 期：18
• 页码：4712-4714
• 全文大小：430 K

文摘

The properties of a five-level K-type system are investigated. With the controlling fields, the properties of the dispersion and absorption of the system are changed greatly. The system can produce anomalous dispersion regions with absorption and normal dispersion regions with absorption or transparency. Furthermore, the group velocity can be varied from subluminal to superluminal by varying the intensity of the controlling field and the probe detunings in principle.