Multicolor coherence-induced negative refraction in three-level atomic system

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（12）
• 页码范围: 71-74
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201210.122701

摘要

Multicolor manipulation of negative refraction in a three-level A atomic system is theoretically investigated.Based on multicolor coherence,the negative refractive index can be obtained with reduced absorption.The refractive index can also be controlled by changing the sum of the phases of the sidebands in the trichromatic driving fields.By adjusting the sum phase,the refractive index can be varied between negative and positive in two different frequency bands.Furthermore,the frequency band corresponding to the negative refractive index is widened by increasing the intensity and the frequency difference of the trichromatic field.