Widely tunable mid-infrared emission from coupled Wannier-Stark ladders in semiconductor superlattices

被引：3
|
作者：
Scamarcio, G [1 ]
Troccoli, M [1 ]
Rizzi, F [1 ]
Catalano, IM [1 ]
机构：
[1] Univ Bari, INFM, Dipartimento Interateneo Fis, I-70126 Bari, Italy
来源：
PHYSICA B-CONDENSED MATTER | 2002年 / 314卷 / 1-4期
关键词：
semiconductor superlattices; Wannier-Stark ladders; mid-infrared emission;
D O I：
10.1016/S0921-4526(01)01390-4
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report on the observation of mid-infrared electroluminescence associated with transitions between electric-field-induced conduction states forming the Wannier-Stark ladder in strongly coupled GaAs/AlAs superlattices. Both interwell and intra-well radiative transitions have been studied in the whole range of electric fields from the moderate localization to the resonance-induced delocalization regimes. The application of average electric fields in the range 100250 kV/cm, allowed to continuously shift the emission peak related with inter-well 1-->1 diagonal transitions between Stark-localized ground states up to the limit corresponding to the merging of the 1-->1 electroluminescence peak with the 2-->1 intersubband emission. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：332 / 335
页数：4
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