Supported by the National Natural Science Foundation of China under Grant No 61205205;the Foundation for Personnel Training Projects of Yunnan Province under Grant No KKSY201207068
Left-handedness with three zero-absorption windows is achieved in a triple-quantum-dot system. With the typ- ical parameters of a GaAs/AlGaAs heterostructure, the simultaneous negative relative electric permittivity a...
Project supported by the National Natural Science Foundation of China (Grant Nos. 60768001 and 10464002)
In this paper we have investigated three external fields interacting with the four-level Y-type atomic system described by the density-matrix approach. The results show that left-handedness with zero absorption is ach...