1. 天津城市建设学院 天津,300384
2. 弱光非线性光子学教育部重点实验室 南开大学 泰达应用物理学院 天津,300475
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贾国治, 姚江宏, 何进密, 等. 结构和磁场对三势垒结构中共振隧穿时间的影响[J]. 发光学报, 2010,31(3):341-347.
JIA Guo-zhi, YAO Jiang-hong, HE Jin-mi, et al. The Effect of Structure and Magnetic Field on Resonant Tunneling Time in Triple-barrier Structures[J]. Chinese Journal of Luminescence, 2010,31(3):341-347.
为了理解在三势垒结构中准束缚能级,E,z,和隧穿寿命对磁场的依赖性,采用传输矩阵的方法研究了在三势垒结构中的共振隧穿过程。分别研究了在三势垒结构中的透射几率特征和隧穿寿命。结果表明:随着中间势垒厚度L的增加,第一准束缚能级E,1z,增加,而第二准束缚能级E,2z,却减小。随着磁场强度B和朗道量子数n的增加,与第一和第二准束缚能级(E,1z,E,2z,)对应的寿命τ缩短。对于B=15 和 n=15的情况,L对τ的影响很小。
To understand the dependence of the quasi-bound level energies ,E,z, and the tunneling lifetime on the magnetic fields ,B, resonant tunneling in the triple-barrier structure was investigated by using the transfer matrix method. Transmission probability characteristics and the tunneling lifetime in the triple-barrier structure are investigated, respectively. The results showed that the first quasi-bound energy levels,E,1z, increase, while the second quasi-bound energy levels ,E,2z, decrease with the increasing of the middle barrier thickness ,L,. The lifetime ,τ, of ,E,1z, and ,E,2z, is shor-tened with increasing of ,B, and Landau quantum number ,n, and the effect of ,L, on ,τ, is weak for ,B,=15 and ,n,=15.
共振隧穿三势垒结构传输矩阵理论
resonant tunnelingtriple-barrier structuretransfer matrix theory
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