Giant Kerr nonlinearity induced by interacting dark resonances.
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.
Niu
Yueping
Y
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Gong
Shangqing
S
Li
Ruxin
R
Xu
Zhizhan
Z
Liang
Xiaoyan
X