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亮暗屏蔽光伏孤子在LiNbO₃晶体中的大自偏转

Large self-deflection of bright and dark screening photovoltaic solitons in LiNbO₃

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【Author】 Zhang Yi-Qi~(1)2)) Lu Ke-Qing~(1)) Zhang Lei~(1)2)) Zhang Mei-Zhi~(1)2)) Li Ke-Hao~(1)2)) 1)(State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China)2)(Graduate University of Chinese Academy of Sciences,Beijing 100049,China)

【机构】中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室；

【摘要】用数值方法证实了亮、暗屏蔽光伏孤子在有外加电场的LiNbO3晶体中都可以发生大自偏转,并验证了这种自偏转现象不但与晶体中受主浓度NA有关而且还与外加电场E0有关.在E0相同的条件下,NA越小这种自偏转现象越明显,在NA相同的条件下,E0越大自偏转现象越明显.还发现亮、暗屏蔽光伏孤子的自偏转现象不同:亮屏蔽光伏孤子整体都发生明显偏转,暗屏蔽光伏孤子的偏转只是发生在一侧,其极值位置和另一侧几乎不发生偏转.更多还原

【Abstract】 We demonstrate large self-deflection of both bright and dark screening photovoltaic solitons existing in LiNbO₃ crystal under an external applied field with numerical method,and we also demonstrate that the self-deflection is not only connected with the acceptor concentration N_A but also with the external applied field E₀.Under the same E₀,when N_A is lower,the self-deflection is more obvious.Under the same N_A,when E₀ is higher,the self-deflection is more obvious.We also find that self-deflection of the bright screening spatial soliton and that of the dark one are different: the bright screening photovoltaic soliton deflects obviously;while only one side of the dark soliton deflects,its extreme value point and the other side almost do not deflect.更多还原