Negative refractive index in a four-level atomic system
张振清, 刘正东, 赵顺才, 郑军, 姬艳芳, 刘念
Negative refractive index in a four-level atomic system
Zhang Zhen-Qing(张振清), Liu Zheng-Dong(刘正东), Zhao Shun-Cai(赵顺才), Zheng Jun(郑军), Ji Yan-Fang(姬艳芳), and Liu Nian(刘念)
中国物理B . 2011, (12): 124202 -124202 .  DOI: 10.1088/1674-1056/20/12/124202