Left handness in a four-level atomic system
Shuncai Zhao, Zhengdong Liu
TL;DR
This paper proposes a quantum coherence-based scheme in a four-level atomic system to achieve simultaneous negative permittivity and permeability, indicating left-handedness, with potential applications due to gain and dispersion properties.
Contribution
It introduces a novel method using quantum coherence in a four-level atomic system to realize left-handed materials over a wider frequency band.
Findings
Achieves simultaneous negative permittivity and permeability in a four-level atomic system.
Wider frequency band for left-handedness due to quantum coherence.
Potential applications from gain and dispersion near resonance.
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.
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