Stark ladders in piezoelectric superlattices.

被引:0
|
作者
Whittaker, DM [1 ]
Peggs, DW [1 ]
Hogg, RA [1 ]
Skolnick, MS [1 ]
Grey, R [1 ]
Mowbray, DJ [1 ]
Rees, GJ [1 ]
机构
[1] UNIV SHEFFIELD,DEPT ELECTR & ELECT ENGN,SHEFFIELD S1 3JD,S YORKSHIRE,ENGLAND
关键词
D O I
10.1007/BF02457279
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We describe an experimental and theoretical investigation of Wannier-Stark ladders in the optical spectra of (111)B InGaAs/GaAs piezoelectric superlattices. A unique feature of these structures is that an external electric field can be used to produce a flat superlattice-that is zero overall potential drop per period-in which there are large, opposing fields in the well and barrier. These fields cause a spatial separation of the electron and hole wave functions in the axial direction, leading to Stark ladders which are intermediate between Type I (electrons and holes together) and Type II (electrons and holes separated by half a period) in character.
引用
收藏
页码:1775 / 1779
页数:5
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