Sat, 05 Jul 2008 12:28:57 BST CiteULike: dhbradshaw's harris http://www.citeulike.org/user/dhbradshaw/tag/harris CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dhbradshaw/article/1038774 <i>Physical Review A (Atomic, Molecular, and Optical Physics), Vol. 73, No. 5. (2006)</i><br /><br />In this paper we report an observation of the two-photon absorption in a four-level system in hot 87Rb vapor based on the proposal of Harris and Yamamoto [Phys. Rev. Lett. 81, 3611 (1998)]. We show that this effect is reduced in hot atoms due to the non-Doppler-free nature of this scheme. Then we report a phenomenon that could be used in the same application of Harris and Yamamoto. The main result is a great enhancement of electromagnetically induced transparency (EIT) effect in hot 87Rb vapor caused by optical pumping. We find that when the single photon detuning is near zero the EIT signal is dramatically enhanced by an optical pumping field. More interestingly when the single photon detuning is larger the signal can be changed from a sharp Raman peak to a sharp EIT dip. The full width at half maximum of the peak and dip are narrow and subnatural. Optical pumping-assisted electromagnetically induced transparency Wei Jiang Qun Chen Yong Zhang GC Guo doi:10.1103/PhysRevA.73.053804 Physical Review A (Atomic, Molecular, and Optical Physics), Vol. 73, No. 5. (2006) 2007-01-12T20:25:18-00:00 2006 Physical Review A (Atomic, Molecular, and Optical Physics) 73 5 APS eit harris lwi http://www.citeulike.org/user/dhbradshaw/article/912806 <i>Optics Letters, Vol. 14, No. 24. (15 December 1989), pp. 1344-1346.</i> Lasers without inversion: interference of dressed lifetime-broadened states A Imamoglu SE Harris Optics Letters, Vol. 14, No. 24. (15 December 1989), pp. 1344-1346. 2006-10-25T21:40:49-00:00 1989 Optics Letters 14 24 1344 1346 harris lwi