Effect of spontaneously generated coherence on Kerr nonlinearity in a four-level atomic system

2008 ◽  
Vol 372 (42) ◽  
pp. 6456-6460 ◽  
Author(s):  
Xiang-an Yan ◽  
Li-qiang Wang ◽  
Bao-yin Yin ◽  
Wen-juan Jiang ◽  
Huai-bin Zheng ◽  
...  
Keyword(s):  
Atomic System ◽  
Kerr Nonlinearity ◽  
Spontaneously Generated Coherence

CONTROL OF ABSORPTION AND KERR NONLINEARITY BASED ON QUANTUM COHERENCE WITHOUT DRIVING FIELD

2010 ◽  
Vol 24 (30) ◽  
pp. 2921-2930 ◽  
Author(s):  
ZHONGHUA HUANG ◽  
AIXI CHEN ◽  
ZHAOCHU CHEN ◽  
LI DENG
Keyword(s):  
Quantum Coherence ◽  
Atomic System ◽  
Electromagnetically Induced Transparency ◽  
Kerr Nonlinearity ◽  
Linear Absorption ◽  
Driving Field ◽  
Spontaneously Generated Coherence ◽  
Traditional Scheme ◽  
Atomic Medium ◽  
Induced Transparency

In a three-level atomic system, the influences of spontaneously generated coherence on the linear absorption and the Kerr nonlinearity are investigated. Our studies show that properties of linear absorption can be dramatically affected by the effect of spontaneously generated coherence. With increase of intensities of spontaneously generated coherence, absorption inhibition will occur, and finally the atomic medium becomes transparent. Furthermore, we find that the Kerr nonlinearity can be obviously enhanced under the action of effects of spontaneously generated coherence. Comparing with traditional scheme of the electromagnetically induced transparency, absorption and Kerr nonlinearity can be controlled without need another driving field in our scheme.

scholarly journals The Kerr Nonlinearity in an N-Type Four-Level System via Spontaneously Generated Coherence

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
Yingjie Du ◽  
Kang Jin ◽  
Junxiang Zhang
Keyword(s):  
Atomic System ◽  
Kerr Nonlinearity ◽  
Level System ◽  
Probe Field ◽  
Spontaneously Generated Coherence

The Kerr nonlinearity is investigated in an N-type four-level atomic system whose both supper levels are degenerated or nearly degenerate. It is found that the spontaneously generated coherence as a result of the degenerate levels can change the Kerr nonlinearity dramatically depending on the angle between two spontaneous channels. In addition, we discover that the probe field makes its own contribution to the nonlinearity in comparison to indifference in general three-level systems.

Enhancement of Kerr nonlinearity via spontaneously generated coherence in a four-level N-type atomic system

2009 ◽  
Vol 282 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Wen-juan Jiang ◽  
Xiang’an Yan ◽  
Jian-ping Song ◽  
Huai-bin Zheng ◽  
Chuanxing Wu ◽  
...  
Keyword(s):  
Atomic System ◽  
Kerr Nonlinearity ◽  
Spontaneously Generated Coherence

scholarly journals Nanoscale Kerr Nonlinearity Enhancement Using Spontaneously Generated Coherence in Plasmonic Nanocavity

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Hongyi Chen ◽  
Juanjuan Ren ◽  
Ying Gu ◽  
Dongxing Zhao ◽  
Junxiang Zhang ◽  
...  
Keyword(s):  
Kerr Nonlinearity ◽  
Spontaneously Generated Coherence

Trichromatic Manipulation of Kerr Nonlinearity in a Three-Level A Atomic System

2008 ◽  
Vol 25 (10) ◽  
pp. 3656-3659 ◽  
Author(s):  
Guo Hong-Ju ◽  
Niu Yue-Ping ◽  
Wang Li-Chun ◽  
Jin Shi-Qi ◽  
Gong Shang-Qing
Keyword(s):  
Atomic System ◽  
Kerr Nonlinearity

Kerr nonlinearity and EIT in a double Lambda type atomic system

2013 ◽  
Vol 115 (4) ◽  
pp. 544-551 ◽  
Author(s):  
Hamid Reza Hamedi ◽  
Ali Khaledi-Nasab ◽  
Ali Raheli
Keyword(s):  
Atomic System ◽  
Kerr Nonlinearity

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.

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