Left-handedness without absorption in the four-level Y-type atomic medium
赵顺才, 刘正东, 吴奇宣
Left-handedness without absorption in the four-level Y-type atomic medium
Zhao Shun-Cai(赵顺才), Liu Zheng-Dong(刘正东), and Wu Qi-Xuan(吴奇宣)
中国物理B . 2010, (1): 14211 -014211 .  DOI: 10.1088/1674-1056/19/1/014211