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

Journal of Atomic Molecular and Optical Physics ◽

10.1155/2009/382764 ◽

2009 ◽

Vol 2009 ◽

pp. 1-4 ◽

Cited By ~ 3

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.

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

Modern Physics Letters B ◽

10.1142/s0217984910025310 ◽

2010 ◽

Vol 24 (30) ◽

pp. 2921-2930 ◽

Cited By ~ 6

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.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.816-817.242 ◽

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

Optics Communications ◽

10.1016/j.optcom.2008.08.054 ◽

2009 ◽

Vol 282 (1) ◽

pp. 101-105 ◽

Cited By ~ 32

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

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

Physics Letters A ◽

10.1016/j.physleta.2008.08.056 ◽

2008 ◽

Vol 372 (42) ◽

pp. 6456-6460 ◽

Cited By ~ 34

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

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Phase-sensitive Kerr nonlinearity of V-type atoms-doped dielectric slab

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863517500539 ◽

2017 ◽

Vol 26 (04) ◽

pp. 1750053

Author(s):

B. Younessi ◽

M. Sahrai ◽

R. Aghbulaghi ◽

J. B. Poursamad

Keyword(s):

Relative Phase ◽

Kerr Nonlinearity ◽

Dielectric Slab ◽

Nonlinear Dispersion ◽

Absorption Properties ◽

Probe Field ◽

Spontaneously Generated Coherence ◽

Phase Sensitive ◽

Linear And Nonlinear ◽

Applied Fields

We investigate the linear and nonlinear dispersion and absorption properties of a weak probe field in a slab doped with V-type atoms. The effect of relative phase between applied fields on linear and nonlinear dispersion and absorption is discussed. It is demonstrated that the system is phase-sensitive when spontaneously generated coherence (SGC) exists. The effects of coupling field intensity, incoherent pump, and phase difference between probe and coupling fields on Kerr nonlinearity are also presented.

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