Left handness in a four-level atomic system

Abstract

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 parametric conditions the system shows that simultaneous negative permittivity and negative permeability(i.e.Left handness) can be achieved in a wider frequency band because of quantum coherence.And the novelty properties of gain and dispersion near the resonance frequency may have some potential applications.

4 pages, 5 figures

References in corpus (5)

• Backward-wave regime and negative refraction in chiral composites
• Finite-size effects of a left-handed material slab on the image quality
• Electromagnetically induced left-handedness in a dense gas of three level atoms
• A spherical perfect lens
• Suppression of left-handed properties in disordered metamaterials

Cited by in corpus (6)

• Negative refraction without absorption via both coherent and incoherent fields in a four-level left-handed atomic system
• Zero absorption and large negative refractive index in a left-handed four-level atomic media
• Negative refraction with absorption suppressed by electromagneticly induced transparency in a left-handed atomic system
• Electromagnetic chirality-induced negative refraction with the same amplitude and anti-phase of the two chirality coefficients
• Left-handedness with three zero-absorption windows tuned by the incoherent pumping field and inter-dot tunnelings in a GaAs/AlGaAs triple quantum dots system
• Left-handedness in the balanced/unbalanced resonance conditions of a quantized composite right-left handed transmission line