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1777016 
Journal Article 
Matched slow pulses using double electromagnetically induced transparency 
Macrae, A; Campbell, G; Lvovsky, AI 
2008 
1 
Optics Letters
ISSN: 0146-9592
EISSN: 1539-4794 
33 
22 
2659-2661 
English 
19015700 
We implement double electromagnetically induced transparency (DEIT) in rubidium vapor using a tripod-shaped energy-level scheme consisting of hyperfine magnetic sublevels of the 5S1/2-->5P1/2 transition. We show experimentally that through the use of DEIT one can control the contrast of transparency windows as well as group velocities of the two signal fields. In particular, the group velocities can be equalized, which holds promise to greatly enhance nonlinear optical interaction between these fields.