准^型四能级原子系统中的多重电磁诱导光透明

J4 ›› 2010, Vol. 27 ›› Issue (1): 21-25.

准^型四能级原子系统中的多重电磁诱导光透明

王祥伟,张向阳

江南大学理学院，江苏无锡 214122

出版日期:2010-01-28 发布日期:2009-12-30
通讯作者: 张向阳，男（1969-），陕西乾县人，副教授，硕导，主要从事量子光学的研究。 E-mail:zhang201800@yahoo.com
作者简介:王祥伟，男（1981-），江苏盐城人，现为江南大学在读硕士生，主要从事量子光学的学习与研究。

Multiple electromagnetically induced transparency in a four-level atomic system

WANG Xiang-Wei, ZHANG Xiang-Yang

School of Science ,Jiangnan University,Wuxi 214122

Published:2010-01-28 Online:2009-12-30

摘要/Abstract

摘要：

运用密度矩阵方程，研究了在外加相干耦合场作用下呈现可调谐多透明窗口的准型四能级系统。数值计算结果表明：通过调节外加相干耦合光场的拉比频率强度，该系统可以三重、双重、单重电磁诱导光透明现象，并在缀饰态表象中给出了定性解释；在三重电磁诱导透明中，透明窗口的位置和吸收峰值可以通过调节外加相干耦合场的失谐量来进行控制。每个透明窗口在吸收最低时都伴随着高折射率，因此可以在此介质中能实现超光速传播。

关键词: 量子光学, 电磁诱导光透明, 吸收性质, 色散性质, 群速度

Abstract:

Using matrix eqution,the absorption and dispersion properties of a lamda-type four-level system driven by coherent fields are investigated.The result obtained by means of numerical method indicates that by adjusting the the intensity of Rabi frequencies of the coherent field in the steady state,three,double or single electromagnetically induced transparency (EIT) can appear explicitly in this system.And the explanations of these phenomena are given by using the dressed states.In the three EIT,the location of transparent windows can be manipulated by controlling the detuning of the driving field.What’s more,it is also found that the medium shows a large refractive index at each transparency window,and the group velocity of the probe laser can be enhanced.

Key words: quantum optics, electromagnetically induced transparency, absorption, dispersion, group velocity

王祥伟,张向阳. 准^型四能级原子系统中的多重电磁诱导光透明[J]. J4, 2010, 27(1): 21-25.

WANG Xiang-Wei, ZHANG Xiang-Yang. Multiple electromagnetically induced transparency in a four-level atomic system[J]. J4, 2010, 27(1): 21-25.

参考文献

[1] Zhang Yanpeng,Andy W,Brown, Xiao Min.Opening four-wave mixing and six-wave mi-xing channels via dual electromagnetically Induced Transparency Windonws
[J].Phys.Rev.Lett,2007,99(12),123603

[2] Boller K J,Imamolu A,Harris S E.Observation of electromagnetically induced transpare-ncy
[J].Phys.Rev.Lett,1991,66(20):2593-2596

[3] Ham B S,Shahriar M S,Kim M K,et al.Frequency-selective time-domain optical data s-torage by electromagnetically induced transparency in a rare-earth-doped solid
[J].Opt.Le-tt,1997,22(24):1849-1851.

[4] Ham B S,Hemmer P R.Coherence switching in a four-level system:quantum switching
[J].Phys.Rev.Lett,2000,84(18):4080-4083

[5] A.Zumbusch,G.R.Holtom,et al.Three-dimensional vibrational imaging by cohernnt anti-st-ockes Raman scattering
[J].Phys.Rev.Lett,1999,82:4142-4147

[6] Ma Hongmei,Gong Shangqing,Xu Zhizhan,et al.Effect of spontaneously in duced coherence on absortion of a ladder-type atom
[J].Chin.Phys,2006,2588-2592

[7] Harris S E.Laser without inversion: Interference of life-time broadened transparency
[J]. Phys.Rev.Lett,1989,62(9):1033-1036

[8] M O Scully,Zhu Shiyao..Degenrate quantum-beat laser without inversion:Lasing without inversion and inversion without lasing
[J].Phys.Rev.Lett,1989,62(24):2813-2816

[9] Zhu Shiyao.Nonlinear theory of the degenerate quantum-beat laser:laser without inversi-on
[J]. Phys.Rev.Lett A,1990,42(9):5537-5543

[10] Dalton B J,Knight P L.Population trapping and ultranarrow Raman lineshapes induced by phase-fluctuating fields
[J].Opt.Commun,1982,42(6):411-416

[11] Niu Yueping,Gong Shangqing.Enhancing Kerr nonlinearity via spontaneously generated coherence
[J].Phys.Rev.Lett A,2006,73(5),053811(6)

[12] Zhang Hongjun,Niu Yueping, Sun Hui, Gong Shangqing.Enhanced Kerr nonlinearity in a negative refractive atomic medium
[J].CHINESE OPTICS LETTERS,2008,6(5):373-376

[13] Niu Yueping,Li Ruxin,Gong Shangqing.High efficiency four-wave mixing induced by double-dark resonances in a five-level tripod system
[J].Phys.Rev.Lett A,2005,71(4),043819

[14] Jin Lihui,Gong Shangqing,Niu Yueping,et al.Controllable group velocity of probe light in a -type system with two fold levels
[J].Phys Lett A,2006,350:117-120

[15] Luk M D,Yelin S F,Fleischhauer M,et al.Quantum interference effects induced by interacting dark resonances
[J].Phys.Rev.A,1999,60(4):3225-3228

[16] Paspalakis E,Knight P L.Electromagnetically induced transparency and controlled group velocity in a multilevel system
[J].Phys.Rev.A,2002,66(1):015802
[17] Mc Gloin D,Fulton D J,Dunn M H.Electromagnetically induced transparency in N-level cascade schemes
[J].Opt.Commun.2001,190:221-229