Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium
Authors: Nguyen Huy Bang , Nguyen Van Phu, Vu Ngoc Sau, Nguyen Thanh Cong, and Le Van Doai
: VOL. 13, NO. 6, DECEMBER 2021 : 2200407
Publishing year: 10/2021