title: Giant Kerr nonlinearity induced by interacting dark resonances.
abstract: A scheme for giant enhancement of the Kerr nonlinearity in a four-level system with double dark resonances is proposed. Compared with that generated in a single-dark-resonance system, the Kerr nonlinearity can be enhanced by several orders of magnitude with vanishing linear absorption. We attribute this dramatic enhancement to the interaction of dark resonances.
authors.affiliation: State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Yueping
authors.initials: Y
authors.lastname: Niu
authors.forename: Shangqing
authors.initials: S
authors.lastname: Gong
authors.forename: Ruxin
authors.initials: R
authors.lastname: Li
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Liang