Time-Resolved Four-Wave Mixing in Optically Dense Medium

Time-resolved four-wave mixing CTRFWMZ) is a powerful method to study dephasing processes in solids [1]. The self-diffraction or two-pulse scheme of this phenomenon is shown in Fig.1. Presently, a number of the experimental and theoretical works dealt with TRFWM is reported [2-8]. Recently, the novel results which demonstrate the anomalous response of TRFWM with a signal at negative time delays, were obtained [9-10]. This effect cannot be predicted on the basis of the traditional Bloch equation approach [2].