LiNbO_3晶体中屏蔽光伏孤子自偏转的时空演化与可控因
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李文慧;忽满利;马志博;种兰祥;万云
【期刊名称】《物理学报》 【年(卷),期】2012(061)002
【摘要】According to the band transport model theory,we establish the temporal evolution for dynamic equations concerning screening photovoltaic solitons in LiNbO_3 crystal in this paper.By using the finite difference method,we find that there exist large self-deflection bright and dark screening photovoltaic solitons in LiNbO_3 crystal,where the shape of the solitons becomes asymmetry ic with the increase of time.In addition,the absolute value of slope of the curve in deflection direction turns larger,while it tends to be smaller in the opposite direction as time increases.On the other hand,analysis shows that the factors related to the degree of self-deflection and deformation include acceptor concentration N_a,dark radiation I_d and applied electric field Eg.When N_A rises,the self-deflection degree and the deformation of bright soliton become smaller and the counterpart of dark soliton has opposite tendency while I_d and E_0 keep invariant.Moreover,for the bright and dark solitons,the space charge field induced in crystals is easier to reach saturation as I_d diminishes and there is no saturation phenomenon in both cases when the ratio between center light
LiNbO_3晶体中屏蔽光伏孤子自偏转的时空演化与可控因素
