title: Efficient frequency conversion induced by quantum constructive interference.
abstract: 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.
authors.affiliation: College of Physics, Jilin University, Changchun 130012, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Xue
authors.forename: Jin-Hui
authors.initials: JH
authors.lastname: Wu
authors.forename: Zhi-Hui
authors.initials: ZH
authors.lastname: Kang
authors.forename: Yun
authors.initials: Y
authors.lastname: Jiang
authors.forename: Si-Sheng
authors.initials: SS
authors.lastname: Liu
authors.forename: Jin-Yue
authors.initials: JY
authors.lastname: Gao