volume | PIER Journals

Abstract

The absorption and dispersion properties of a Kobrak-Rice 5-level quantum system are investigated. It is shown that the dressed states of such a system are phase-dependent. It is also demonstrated that the absorption, dispersion and group index can be controlled by either the intensity or relative phase of driving fields. Moreover, we have shown that by applying an incoherent pumping field the absorption doublet switches to gain doublet, and the absorption free superluminal light propagation appears which can be used in the transfer of information process.

1. Moon, H. S., S. K. Kim, K. Kim, C. H. Lee, and J. B. Kim, "Atomic coherence changes caused by optical pumping applied to electromagnetically induced absorption," J. Phys. B: At. Mol. Opt. Phys., Vol. 36, 3721-3729, 2003.
doi:10.1088/0953-4075/36/18/302 Google Scholar

2. Scully, M. O., S. Y. Zhu, and A. Gavrielides, "Degenerate quantum-beat laser: Lasing without inversion and inversion without lasing," Phys. Rev. Lett., Vol. 62, 2813-2816, 1989.
doi:10.1103/PhysRevLett.62.2813 Google Scholar

3. Scully, M. O., "Enhancement of the index of refraction via quantum coherence," Phys. Rev. Lett., Vol. 67, 1855-1858, 1991.
doi:10.1103/PhysRevLett.67.1855 Google Scholar

4. Boller, K. J., A. Imamoglu, and S. E. Harris, "Observation of electromagnetically induced transparency," Phys. Rev. Lett., Vol. 66, 2593-2596, 1991.
doi:10.1103/PhysRevLett.66.2593 Google Scholar

5. Harris, S. E., "Electromagnetically induced transparency," Phys. Today, Vol. 50, No. 7, 36-42, 1997.
doi:10.1063/1.881806 Google Scholar

6. See for example, a review by L. A. Lugiato, "Theory of optical bistability," Progress in Optics, Vol. 21, 71-211, E. Wolf (ed.), North-Holland, Amesterdam, 1984. Google Scholar

7. Bigelow, M. S., N. N. Lepeshkin, and R. W. Boyd, "Ultra-slow and superluminal light propagation in solids at room temperature," J. Phys.: Condens. Matter, Vol. 16, R1321-1340, 2004.
doi:10.1088/0953-8984/16/46/R01 Google Scholar

8. Korsunsky, E. A. and D. V. Kosachiov, "Phase-dependent nonlinear optics with double-¤ atoms," Phys. Rev. A, Vol. 60, 4996-5009, 1999.
doi:10.1103/PhysRevA.60.4996 Google Scholar

9. Bortman-Arbiv, D., A. D. Wilson-Gordon, and H. Friedmann, "Phase control of group velocity: From subluminal to superluminal light propagation," Phys. Rev. A, Vol. 63, 043818, 2001.
doi:10.1103/PhysRevA.63.043818 Google Scholar

10. Morigi, G., S. Franke-Arnold, and G. L. Oppo, "Phase-dependent interaction in a four-level atomic configuration," Phys. Rev. A, Vol. 66, 053409, 2002.
doi:10.1103/PhysRevA.66.053409 Google Scholar

11. Wang, G., X. Yan, J. H.Wu, and J. Y. Gao, "The phase dependent properties of gain and absorption in an Er3+-doped yttrium aluminum garnet crystal," Opt. Commun., Vol. 267, 118-123, 2006.
doi:10.1016/j.optcom.2006.06.002 Google Scholar

12. Paspalakis, E., C. H. Keitel, and P. L. Knight, "Fluorescence control through multiple interference mechanisms," Phys. Rev. A, Vol. 58, 4868-4877, 1998.
doi:10.1103/PhysRevA.58.4868 Google Scholar

13. Mahmoudi, M. and J. Evers, "Light propagation through closed-loop atomic media beyond the multi-photon resonance condition," Phys. Rev. A, Vol. 74, 063827, 2006.
doi:10.1103/PhysRevA.74.063827 Google Scholar

14. Korsunsky, E. A., et al. "Phase-dependent electromagnetically induced transparency," Phys. Rev. A, Vol. 59, 2302-2305, 1999.
doi:10.1103/PhysRevA.59.2302 Google Scholar

15. Sahrai, M., H. Tajalli, K. T. Kaple, and M. S. Zubairy, "Tunable phase control for subluminal to superluminal light propagation," Phys. Rev. A, Vol. 70, 023813, 2004.
doi:10.1103/PhysRevA.70.023813 Google Scholar

16. Sahrai, M., M. Mahmoudi, and R. Kheradmand, "The impact of the relative phase on the transient optical properties of a four --- Level EIT medium," Phys. Lett. A, Vol. 367, 408-414, 2007.
doi:10.1016/j.physleta.2007.03.014 Google Scholar

17. Kobrak, M. N. and S. A. Rice, "An extension of stimulated raman selective photochemistry via adiabatic passage: Adiabatic passage for degenerate final states," Phys. Rev. A, Vol. 57, 2885-2894, 1998.
doi:10.1103/PhysRevA.57.2885 Google Scholar

18. Ou, B. Q., L. M. Liang, and C. Z. Li, "Quantum coherence effects in a four-level diamond-shape atomic system," Opt. Commun., Vol. 282, 2870-2877, 2009.
doi:10.1016/j.optcom.2009.03.034 Google Scholar

19. Gong, J. and S. A. Rice, "Measurement-assisted coherent control," J. Chem. Phys., Vol. 120, 9984-9988, 2004.
doi:10.1063/1.1735644 Google Scholar

20. Sugawara, M., "Measurement-assisted quantum dynamics control of 5-level system using intense CW-laser fields," Chem. Phys. Lett., Vol. 428, 457-460, 2006.
doi:10.1016/j.cplett.2006.07.069 Google Scholar

21. Rayleigh, L., "On progressive waves," Proc. Lond. Math. Soc., Vol. 9, 21-26, 1877.
doi:10.1112/plms/s1-9.1.21 Google Scholar

22. Wang, L. J., A. Kuzmich, and A. Dogariu, "Gain-assisted superluminal light propagation," Nature, Vol. 406, 277-279, London, 2000.
doi:10.1038/35018520 Google Scholar

23. Wang, L. G., N. H. Liu, Q. Lin, and S. Y. Zhu, "Effect of coherence on the superluminal propagation of light pulses through anomalously dispersive media with gain," Europhys. Lett., Vol. 60, 834-840, 2002.
doi:10.1209/epl/i2002-00292-4 Google Scholar

24. Gauthier, D. J. and R. W. Boyd, "Fast light, slow light, and optical precursors, what does it all mean?," Photonics Spectra, 82-89, Jan., 2007. Google Scholar

25. Scully, M. O. and M. S. Zubairy, Quantum Optics, Cambridge University Press, 1997.

26. Lukin, M. D., S. F. Yelin, M. Fleishhauer, and M. O. Scully, "Quantum interference e®ects induced by interacting dark resonances," Phys. Rev. A, Vol. 60, 3225-3228, 1999.
doi:10.1103/PhysRevA.60.3225 Google Scholar

27. Li, Y. F., J. F. Sun, X. Y. Zhang, and Y. C.Wang, "Laser-induced double-dark resonances and double-transparencies in a four-level system," Opt. Commun., Vol. 202, 97-102, 2002.
doi:10.1016/S0030-4018(02)01072-6 Google Scholar

28. Feng, Z. F., W. D. Li, L. T. Xiao, and S. T. Jia, "The double dark resonance in a cold gas of Cs atoms and molecules," Opt. Exp., Vol. 16, 15870-15879, 2008.
doi:10.1364/OE.16.015870 Google Scholar

29. Yang, W. F., S. Q. Gong, Y. P. Niu, S. Q. Jin, and Z. Z. Xu, "Enhancement of four-wave mixing induced by interacting dark resonances," J. Phys. B: At. Mol. Opt. Phys., Vol. 38, 2657-2663, 2005.
doi:10.1088/0953-4075/38/15/006 Google Scholar

30. Gavra, N., M. Rosenbluh, T. Zigdon, A. D. Wilson-Gordon, and H. Friedmann, "Sub-doppler and sub-natural narrowing of an absorption line," Opt. Commun., Vol. 280, 374-378, 2007.
doi:10.1016/j.optcom.2007.08.012 Google Scholar

31. Cheng, D., C. Liu, Y. Niu, S. Jin, R. Li, and S. Gong, "Sub-wavelength atom localization in double-dark resonant systems," Chin. Opt. Lett., Vol. 5, S268-S271, 2007. Google Scholar

32. Mahmoudi, M., R. Fleischhaker, M. Sahrai, and J. Evers, "Group velocity control in the ultraviolet domain via interacting dark-state resonances," J. Phys. B: At. Mol. Opt.Phys., Vol. 41, 025504, 2008.
doi:10.1088/0953-4075/41/2/025504 Google Scholar

33. Mahmoudi, M., M. Mousavi, and M. Sahrai, "Controlling the optical bistability via interacting dark-state resonances," Eur. Phys. J. D, Vol. 57, 241-246, 2010.
doi:10.1140/epjd/e2010-00020-1 Google Scholar

34. Private Communications with Prof. D. J. Gauthier and Prof. R. W. Boyd.

Prof. Mohammad Mahmoudi

Dr. Mostafa Sahrai

Dr. Mohammad Ali Allahyari