24 citations · 61 across the 4 of their papers we have counts for
4 papers
Negative refraction with low absorption using EIT in a four-level left-handed atomic system
Shun-Cai Zhao, Zheng-Dong Liu, Gen Li +1
We suggest a scheme for obtaining negative refraction with low absorption in a left-handed atomic system.Under the the appropriate conditions,the atomic system displays negative re…
Left handness in a four-level atomic system
Shuncai Zhao, Zhengdong Liu
A scheme is proposed for realizing simultaneous negative permittivity and negative permeability based on quantum coherence in a four-level dense atomic system here.Under some param…
Negative refraction without absorption via both coherent and incoherent fields in a four-level left-handed atomic system
Shun-Cai Zhao, Zheng-Dong Liu, Qi-Xuan Wu
This paper attempts a probe into negative refraction without absorption by means of an incoherent pump field and a strong coherent field coupling the dense four-level atomic system…
Zero absorption and large negative refractive index in a left-handed four-level atomic media
Shuncai Zhao, Zhengdong Liu, Qixuan Wu
In this paper,we have investigated three external fields interacting with the four-level atomic system described by the density-matrix approach.The atomic system exhibits left-hand…