低振幅双光子光伏孤子的时间及演化特性分析
摘要
In order to study the temporal behavior and propagation property of one-dimensional two-photon photovoltaic spatial solitons in low-amplitude regime and under open-circuit conditions, the expressions of time-dependent space-charge field and dynamical evolution equation are obtained. The intensity profiles of bright, dark and grey photovoltaic solitons are obtained by solving numerically solution of such solitons. Furthermore, the properties of such solitons are investigated by numerical method. The results indicate that a broad soliton is generated at the beginning, and as time evolves, the intensity width of photovoltaic spatial solitons decreases monotonously to a minimum value toward steady state. Within the same propagation time, the higher the ratio of soliton peak intensity to the dark irradiation intensity is, the shorter the FWHM of photovoltaic solitons is. Bright, dark and grey solitons have the similar temporal properties.