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The phenomenon of electromagnetically induced transparency (EIT) in 85Rb atomic vapor is studied in a -type of four-level system with the coupling laser frequency detuned from the atomic resonance frequency. We find that the EIT intensity grows weaker as the coupling laser frequency is detuned from resonance, but the relative depth of the transparency window increases. The maximum depth appears when the coupling frequency is detuned at about +180 MHz, not at the resonance frequency. We demonstrate that this is a result of the combined effect of the two excited states, and present a theoretical analysis based on the four-level system, which agrees quite well with the experimental results.
[1] Harris S E 1989 Phys. Rev. Lett. 62 1033
[2] Boller K J, Imamolu A, Harris S E 1991 Phys. Rev. Lett. 66 2593
[3] Zibrov A S, Lukin M D, Scully M O 1999 Phys. Rev. Lett. 83 4049
[4] Scully M O 1991 Phys. Rev. Lett. 67 1855
[5] Kash M M, Sautenkov V A, Zibrov A S, Hollberg L, Welch G R., Lukin M D, Rostovtsev Y, Fry E S, Scully M O 1999 Phys. Rev. Lett. 82 5229
[6] Kasapi A, Jain M, Yin G Y, Harris S E 1995 Phys. Rev. Lett. 74 2447
[7] Hau L V, Harris S E, Dutton Z, Behroozi C H 1999 Nature 397 594
[8] Fleischhauer M, Lukin M D 2000 Phys. Rev. Lett. 84 5094
[9] Chen Y H, Lee M J, Wang I C, Du S W, Chen Y F, Chen Y C, Yu I A 2013 Phys. Rev. Lett. 110 083601
[10] Liu C, Dutton Z, Behroozi C H, Hau L V 2001 Nature 409 490
[11] Kuzmich A, Bowen W P, Boozer A D, Boca A, Chou C W, Duan L M, Kimble H J 2003 Nature 423 731
[12] Ding D S, Wu J H, Zhou Z Y, Liu Y, Shi B S, Zou X B, Guo G C 2013 Phys. Rev. A 87 013835
[13] Ding D S, Wu J H, Zhou Z Y, Liu Y, Shi B S, Zou X B, Guo G C 2013 Phys. Rev. A 87 053830
[14] Pei L Y, Wang R Q, Zuo Z C, Wu L A, Fu P M 2013 Acta Phys. Sin. 62 124208 (in Chinese) [裴丽娅, 王如泉, 左战春, 吴令安, 傅盘铭 2013 62 124208]
[15] Wang Y H, Wang J M, YAN S B, Liu T , Zhang T C 2005 Chin. J. Lasers 32 16 (in Chinese) [王彦华, 王军民, 闫树斌, 刘涛, 张天才 2005 中国激光 32 16]
[16] Pei L Y, Lu X G, Bai J H, Miao X X, Wang R Q, Wu L A, Ren S W, Jiao Z Y, Zhu H F, Fu P M, Zuo Z Z 2013 Phys. Rev. A 87 063822
[17] Mendes M S, Saldanha P L, Tabosa J W R, Felinto D 2013 New J. Phys. 15 1
[18] Vurgaftman I, Bashkansky M 2013 Phys. Rev. A 87 063836
[19] Fiore V, Yang Y, Kuzyk M C, Barbour R, Tian L, Wang H L 2011 Phys. Rev. Lett. 107 133601
[20] Meng X D, Tian L, Zhang Z Y, Yan Z H, Li S J, Wang H 2012 Acta Sin. Quant. Opt. 18 357 (in Chinese) [孟祥栋,田龙, 张志英, 闫智辉, 李淑静, 王海 2012 量子光学学报 18 357]
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[1] Harris S E 1989 Phys. Rev. Lett. 62 1033
[2] Boller K J, Imamolu A, Harris S E 1991 Phys. Rev. Lett. 66 2593
[3] Zibrov A S, Lukin M D, Scully M O 1999 Phys. Rev. Lett. 83 4049
[4] Scully M O 1991 Phys. Rev. Lett. 67 1855
[5] Kash M M, Sautenkov V A, Zibrov A S, Hollberg L, Welch G R., Lukin M D, Rostovtsev Y, Fry E S, Scully M O 1999 Phys. Rev. Lett. 82 5229
[6] Kasapi A, Jain M, Yin G Y, Harris S E 1995 Phys. Rev. Lett. 74 2447
[7] Hau L V, Harris S E, Dutton Z, Behroozi C H 1999 Nature 397 594
[8] Fleischhauer M, Lukin M D 2000 Phys. Rev. Lett. 84 5094
[9] Chen Y H, Lee M J, Wang I C, Du S W, Chen Y F, Chen Y C, Yu I A 2013 Phys. Rev. Lett. 110 083601
[10] Liu C, Dutton Z, Behroozi C H, Hau L V 2001 Nature 409 490
[11] Kuzmich A, Bowen W P, Boozer A D, Boca A, Chou C W, Duan L M, Kimble H J 2003 Nature 423 731
[12] Ding D S, Wu J H, Zhou Z Y, Liu Y, Shi B S, Zou X B, Guo G C 2013 Phys. Rev. A 87 013835
[13] Ding D S, Wu J H, Zhou Z Y, Liu Y, Shi B S, Zou X B, Guo G C 2013 Phys. Rev. A 87 053830
[14] Pei L Y, Wang R Q, Zuo Z C, Wu L A, Fu P M 2013 Acta Phys. Sin. 62 124208 (in Chinese) [裴丽娅, 王如泉, 左战春, 吴令安, 傅盘铭 2013 62 124208]
[15] Wang Y H, Wang J M, YAN S B, Liu T , Zhang T C 2005 Chin. J. Lasers 32 16 (in Chinese) [王彦华, 王军民, 闫树斌, 刘涛, 张天才 2005 中国激光 32 16]
[16] Pei L Y, Lu X G, Bai J H, Miao X X, Wang R Q, Wu L A, Ren S W, Jiao Z Y, Zhu H F, Fu P M, Zuo Z Z 2013 Phys. Rev. A 87 063822
[17] Mendes M S, Saldanha P L, Tabosa J W R, Felinto D 2013 New J. Phys. 15 1
[18] Vurgaftman I, Bashkansky M 2013 Phys. Rev. A 87 063836
[19] Fiore V, Yang Y, Kuzyk M C, Barbour R, Tian L, Wang H L 2011 Phys. Rev. Lett. 107 133601
[20] Meng X D, Tian L, Zhang Z Y, Yan Z H, Li S J, Wang H 2012 Acta Sin. Quant. Opt. 18 357 (in Chinese) [孟祥栋,田龙, 张志英, 闫智辉, 李淑静, 王海 2012 量子光学学报 18 357]
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