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Based on the far off-resonant four-wave mixing process, the slow light propagations of the amplified probe and generated conjugate pulses are obtained experimentally. Simultaneous manipulations of group velocity are realized by changing the two-photon detuning between the pump light and the probe light. The dependences of gains of the injected probe and generated conjugate light on the one-photon detuning for continuous wave mode are studied at different cesium vapor temperatures and pump light powers. It is shown that the maximum of gains occurs at the proper Raman one-photon detuning. The dependence of delay time on the two-photon detuning is measured using the 6 μs and 365 ns probe pulses, respectively. For the 6 μs input probe pulse, the maximum delay times of the probe and the conjugate pulses are 2.1 μs and 1.9 μs with the fractional delays of 0.35 and 0.32, respectively, corresponding to 0.000119 c and 0.000132 c group velocity. The high fractional delays of 2.07 and 1.83 with the maximum delay times of 756 ns and 670 ns for the 365 ns input pulse are obtained.
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Keywords:
- group velocity /
- slow light /
- four-wave mixing /
- far off-resonant detuning
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[1] Hau L V, Harris S E, Dutton Z, Behroozi C H 1999 Nature 397 594
[2] Fleischhauer M, Imamoglu A, Marangos J P 2005 Rev. Mod. Phys. 77 633
[3] Novikova I, Walsworth R L, Xiao Y H 2012 Laser Photonics Rev. 6 333
[4] Meng D D, Liu X D, Zhang S L 2011 Acta Phys. Sin. 60 020305 (in Chinese) [孟冬冬, 刘晓东, 张森林 2011 60 020305]
[5] Bigelow M S, Lepeshkin N N, Boyd R W 2003 Phys. Rev. Lett. 90 113903
[6] Bigelow M S, Lepeshkin N N, Boyd R W 2003 Nature 301 200
[7] Thevenaz L 2008 Nature Photonics 2 474
[8] Zhang Z Y, Shi S H, Liang R, Zhou X J 2010 Acta Phys. Sin. 59 4694 (in Chinese) [张旨遥, 石胜辉, 梁锐, 周晓军 2010 59 4694]
[9] Chu S, Wong S 1982 Phys. Rev. Lett. 48 738
[10] Akulshin A M, Cimmino A, Sidorov A I, Hannaford P, Opat G I 2003 Phys. Rev. A 67 011801
[11] Kim K, Moon H S, Lee C, Kim S K, Kim J B 2003 Phys. Rev. A 68 013810
[12] Wang L J, Kuzmich A, Dogariu A 2000 Nature 406 277
[13] Stenner M D, Gauthier D J, Neifeld M A 2003 Nature 425 695
[14] Jasperse M, Turner L D, Scholten R E 2011 Opt. Express 19 3765
[15] Guo M J, Zhou H T, Wang D, Gao J R, Zhang J X, et al 2014 Phys. Rev. A 89 033813
[16] Boyer V, McCormick C F, Arimondo E, Lett P D 2007 Phys. Rev. Lett. 99 143601
[17] Boyd R W 2011 J. Opt. Soc. Am. B 28 A38
[18] Glasser R T, Vogl U, Lett P D 2012 Phys. Rev. Lett. 108 173902
[19] Pati G S, Salit M, Salit K, Shahriar M S 2009 Opt. Express 17 8775
[20] Fan Y F, Wang H H, Wei X G, Li A J, Kang Z H 2012 Phys. Lett. A 376 785
[21] Chen Z J, Luo B, Liu Y, Guo H 2013 Opt. Commun. 309 187
[22] Ding D S, Zhou Z Y, Shi B S 2013 Chin. Phys. B 22 114203
[23] Pooser R C, Marino A M, Boyer V, Jones K M, Lett P D 2009 Opt. Express 17 16722
[24] Boyd R W, Gauthier D J, Gaeta A L, Willner A E 2005 Phys. Rev. A 71 023801
[25] Ishikura N, Baba T, Kuramochi E, Notomi M 2011 Opt. Express 19 24102
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