Soliton Propagation in a Left-handed Four-Level Atomic System

2020 ◽  
Vol 14 (4) ◽  
pp. 729-732
Keyword(s):  
Atomic System ◽  
Soliton Propagation ◽  
Left Handed

Toggle switch from optical bistability to multistability via an elliptically polarized field

2017 ◽  
Vol 31 (17) ◽  
pp. 1750191 ◽  
Author(s):  
Xiang-An Yan ◽  
Bo-Quan Ren ◽  
Li-Qiang Wang ◽  
Yao-Wu Liu ◽  
Hua-Wa Yu
Keyword(s):  
Quantum Interference ◽  
Optical Bistability ◽  
Atomic System ◽  
Hysteresis Cycle ◽  
Toggle Switch ◽  
Left Handed ◽  
Cycle Shape ◽  
Optimal Intensity ◽  
The Right ◽  
Elliptically Polarized

In this paper, we propose a scheme for manipulating the behavior of optical bistability (OB) and optical multistability (OM) in an N-type four-level atomic system. In the scheme, quantum interference is optimized by the left-handed and the right-handed fields of an elliptically polarized field (EPF). The threshold and the hysteresis cycle shape of OB and OM can be controlled by modulating the intensity of the EPF. Especially, the transition from OB to OM or vice versa can also be easily realized by proper tuning the phase difference between the left-handed and right-handed polarized fields under the optimal intensity of the EPF.

Left-Handed Material in Five-Level System Based on the Effect of Spontaneously Generated Coherence

2013 ◽  
Vol 816-817 ◽  
pp. 242-245
Author(s):  
Xiang An Yan ◽  
Li Qiang Wang
Keyword(s):  
Refractive Index ◽  
Density Matrix ◽  
Quantum Coherence ◽  
Atomic System ◽  
Negative Refractive Index ◽  
Matrix Approach ◽  
Level System ◽  
Spontaneously Generated Coherence ◽  
Left Handedness ◽  
Left Handed

We propose a scheme for realizing negative refractive index in a multilevel atomic system. The theoretical modeling has been done using density matrix approach in which the spontaneously generated coherence (SGC) is also induced. It is shown that the negative refractive index can be obtained on the effect of quantum coherence. The parameters () quantifying left-handedness in the system become more negative if the SGC is defined in the appropriate value. Furthermore, left-handed material with reduced absorption is possible by choosing appropriate parameters.

Thermal bath effect on soliton propagation in three-level atomic system

2009 ◽  
Vol 159 (13) ◽  
pp. 1239-1243 ◽  
Author(s):  
N. Boutabba ◽  
H. Eleuch ◽  
H. Bouchriha
Keyword(s):  
Atomic System ◽  
Thermal Bath ◽  
Soliton Propagation

Kerr nonlinearity with vanishing absorption in a left-handed three-level atomic system

Optik ◽  
2014 ◽  
Vol 125 (1) ◽  
pp. 473-476
Author(s):  
X.-y. Yang ◽  
Y.-y. Jiang
Keyword(s):  
Atomic System ◽  
Kerr Nonlinearity ◽  
Left Handed
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