ULTRAFAST EDGE PHOTOEXCITATION AND COHERENT OSCILLATIONS IN TUNNEL-COUPLED DOUBLE-QUANTUM WELLS

被引：21
|
作者：
VASKO, FT
RAICHEV, OE
机构：
[1] Institute of Semiconductor Physics, National Academy of Sciences of the Ukraine, Kiev-28, 252650
来源：
PHYSICAL REVIEW B | 1995年 / 51卷 / 23期
关键词：
D O I：
10.1103/PhysRevB.51.16965
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Photoexcitation of electrons in double quantum wells is studied as a function of level splitting, duration of the light pulse τp, and light frequency. Dynamics of transitions between the upper states of the valence band and the tunnel-coupled pair of conduction band states is considered in the collisionless approximation. The nonmonotonic temporal dependence of the photoexcited electron concentration (the saturation value of this concentration determines the time-integrated interband photoluminescence intensity) is obtained for the times t∼τp. Transition from the nonperiodic (at t∼τp) to the periodic (at tτp) behavior of the dipole moment oscillations is described. © 1995 The American Physical Society.
引用
收藏
页码：16965 / 16972
页数：8
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