We demonstrate in experiment an efficient cw four-wave mixing scheme with maximal intensity conversion efficiency up to 73% in a double-Λ system of hot rubidium atoms. Relevant theoretical analysis shows that this high conversion efficiency benefits greatly from the constructive interference between two four-wave mixing channels, characterized by two different space-dependent phases.
© 2010 Optical Society of America
Original Manuscript: August 30, 2010
Revised Manuscript: September 27, 2010
Manuscript Accepted: October 11, 2010
Published: November 8, 2010
Gang Wang, Yan Xue, Jin-Hui Wu, Zhi-Hui Kang, Yun Jiang, Si-Sheng Liu, and Jin-Yue Gao, "Efficient frequency conversion induced by quantum constructive interference," Opt. Lett. 35, 3778-3780 (2010)