Chinese Optics Letters, 2010, 8 (8): 795, Published Online: Aug. 12, 2010
Enhancement of nonlinear susceptibility in a four-level tripod scheme
三角架原子系统 电磁感应透明 Kerr非线性 缀饰态理论 190.3270 Kerr effect 270.1670 Coherent optical effects 270.6620 Strong-field processes
Abstract
We propose a scheme for the enhancement of nonlinear susceptibility in a four-level tripod-type atomic system in the presence of a microwave field. With a microwave field, nonlinear susceptibility can be enhanced. Nonlinearity can also be ulteriorly enhanced by controlling the coupling field under the optimal intensity of the microwave field. The physical mechanism of the obtained giant nonlinear susceptibility is mainly based on interactions between microwave field and coupling fields. We present a physical understanding of our numerical results using a dressed-state approach and an analytical explanation.
Xiang′an Yan, Liqiang Wang, Baoyin Yin, Jianping Song. Enhancement of nonlinear susceptibility in a four-level tripod scheme[J]. Chinese Optics Letters, 2010, 8(8): 795.