偶极激子的静电俘获  

Electrostatic traps for dipolar excitons

作　　者：白占国[1] 汤叔楩[1] 赵艳芳[2] 

机构地区：[1]河北科技大学理学院,河北石家庄050018 [2]邯郸职业技术学院机电系,河北邯郸056001

出　　处：《河北大学学报（自然科学版）》2007年第6期653-658,共6页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金资助项目(E2004000290);河北科技大学基金资助项目(XL2006047)

摘　　要：考虑设计偶极间接激子的2维静电俘获.可以看到,与由于陷阱几何增加的平面电场结合的激子偶极-偶极相互作用约束所俘获的最大密度和寿命.导出这些值的解析估算,并确定它们与陷阱几何的关系,提出观察激子的Bose-Einstein凝聚方法中的高密度陷俘的最佳设计.The design of two-dimensional electrostatic traps for dipolar indirect excitons is discussed. It is shown that the excitons dipole-dipole interaction, combined with the in-plane electric fields that arise due to the trap geometry, constrain the maximal density and lifetime of trapped excitons. An analytic estimate of these values and determine their dependence on the trap geometry are derived, thus it is suggested that the optimal design for high density trapping as a route for observing excitonic Bose-einstein condensation,

关 键 词：偶极激子 静电俘获 实验方法 

分 类 号：O766[理学—晶体学] O441.6