Waveguides Induced by Screening-Photovoltaic Solitons in Biased Photorefractive--Photovoltaic Crystals
LU Ke-Qing1, ZHANG Mei-Zhi1, ZHAO Wei1, YANG Yan-Long1, YANG Yang1, ZHANG Yu-Hong1, LIU Xue-Ming1, ZHANG Yan-Peng2, SONG Jian-Ping2
1State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710068
2Department of Electronic Science and Technology, Xi’an Jiaotong University, Xi’an 710049
Waveguides Induced by Screening-Photovoltaic Solitons in Biased Photorefractive--Photovoltaic Crystals
LU Ke-Qing1;ZHANG Mei-Zhi1;ZHAO Wei1;YANG Yan-Long1;YANG Yang1;ZHANG Yu-Hong1;LIU Xue-Ming1;ZHANG Yan-Peng2; SONG Jian-Ping2
1State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710068
2Department of Electronic Science and Technology, Xi’an Jiaotong University, Xi’an 710049
Abstract： We investigate theoretically waveguides induced by screening-photovoltaic solitons in biased photorefractive--photovoltaic crystals. We show that the number of guided modes in a waveguide induced by a bright screening-photovoltaic soliton increases monotonically with the increasing intensity ratio of the soliton, which is the ratio between the peak intensity of the soliton and the dark irradiance. On the other hand, waveguides induced by dark screening-photovoltaic solitons are always single mode for all intensity ratios and the confined energy near the centre of a dark screening-photovoltaic soliton increases monotonically with the increasing intensity ratio. When the bulk photovoltaic effect is neglectable, these waveguides are those
induced by screening solitons. When the external field is absent, these waveguides predict those induced by photovoltaic solitons.
2006, Vol. 23 
