JMP  Vol.1 No.4 , October 2010
Observation of Superluminal in Doppler Broadened Two-Level Atomic Systems in Magnetic Field
ABSTRACT
A novel method to control the group velocity of light propagation in a two-level atomic system without additional optical field is proposed. Numerical result and experimental data shows that by changing the magnetic field intensity and vapor temperature, the group velocity of probe light can be controlled in an appropriate region.

Cite this paper
nullS. Liu, Y. Zhang, H. Wu and P. Yuan, "Observation of Superluminal in Doppler Broadened Two-Level Atomic Systems in Magnetic Field," Journal of Modern Physics, Vol. 1 No. 4, 2010, pp. 276-280. doi: 10.4236/jmp.2010.14038.
References
[1]   S. E. Harris, “Electromagnetically Induced Transparency,” Physics Today, Vol. 50, No. 7, 1997 pp. 36-42.

[2]   J. P. Marangos, “Topical Review Electromagnetically Induced Transparency,” Journal of Modern Optics, Vol. 45, No. 3, 1998, pp. 471-503.

[3]   J. G. Banacloche, Y. Li, S. Jin and M. Xiao, “Observation of an Electromagnetically Induced Change of Absorption in Multilevel Rubidium Atoms,” Physical Review A, Vol. 51, No. 3, 1997, pp. R1754-R1757.

[4]   M. Fleischhauer, A. Imamoglu and J. P. Marangos, “Electromagnetically Induced Transparency: Optics in Coherent Media,” Reviews of Modern Physics, Vol. 77, No. 2, 2005, pp. 633-678.

[5]   M. S. Bigelow, N. N. Lepeshkin and R. W. Boyd, “Observation of Ultraslow Light in a Ruby Crystal at Room Temperature,” Physical Review Letters, Vol. 90, No. 11, 2003, p. 113903.

[6]   M. S. Bigelow, N. N. Lepeshkin and R. W. Boyd, “Superluminal and Slow Light Propagation in a Room-Temperature Solid,” Science, Vol. 301, No. 5630, 2003, pp. 200-202.

[7]   P. Dong and J. Y. Gao, “Appearance and Disappearance of Hole-Burrning behind an Electromanetically Induced Transparency Window,” Physical Letter A, Vol. 265, No. 1-2, 2000, pp. 52-57.

[8]   J. H. Wu, X. G. Wei, D. F. Wang, Y. Chen and J. Y. Gao, “Coherent Hole-Burning Phenomenon in a Doppler Braodened Three-Level-Type Atomic System,” Journal of Optics B, Vol. 6, No. 1, 2004, pp. 54-58.

[9]   E. Podivilov, B. Sturman, A. Shumelyuk and S. Odoulov, “Light Pulse Slowing down up to 0.025 Cm/S by Pho- torefractive Two-Wave Coupling,” Physical Review Letters, Vol. 91, No. 8, 2003, p. 83902.

[10]   K. Y. Song, M. G. Herraez and L. Thevenaz, “Gain-Assisted Pulse Advancement Using Single and Double Brillouin Gain Peaks in Optical Fibers,” Optic Express, Vol. 13, No. 24, 2005, pp. 9758-9765.

[11]   J. Q. Liang, M. Katsuragawa, F. L. Kien and K. Hakuta, “Slow Light Produced by Stimulated Raman Scattering in Solid Hydrogen,” Physical Review A, Vol. 65, No. 3, 2002, p. 31801.

[12]   L. Brillouin, “Wave Propagation and Group Velocity,” Academic Press, New York, 1960.

[13]   L. J. Wang, A. Kuzmich and A. Dogariu, “Gain-Assisted Superluminal Light Propagation,” Nature, Vol. 406, No. 6793, 2000, pp. 277-283.

[14]   G. S. Agarwal and T. N. Dey, “Sub- and Superluminal Propagation of Intense Pulses in Media with Saturated and Reverse Absorption,” Physical Review Letters, Vol. 92, No. 20, 2004, p. 203901.

[15]   H. Wang, Y. D. Zhang, N. Wang, W. L. Yan, H. Tian, W. Qiu and P. Yuan, “Observation of Superluminal Propagation at Negative Group Velocity in C60 Solution,” Applied Physics Letters, Vol. 90, No. 12, 2007, p. 121107.

[16]   H. Wang, Y. D. Zhang, L. Ma, Z. S. He, H. Tian and P. Yuan, “Experimental Observation of Negative Group Velocity in C-60 PMMA,” OPTIK, Vol. 120, No. 13, 2009, pp. 673-675.

[17]   B. Yin and T. M. Shay, “Theoretical Model for a Faraday Anomalous Dispersion Optical Filter,” Optical Letters, Vol. 16, No. 20, 1991, pp. 1617-1619.

[18]   Daniel A. Steck, Cesium D Line Data, 1998. http://stech.us/alkalidata

 
 
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