Nonlinear transport in quantum-cascade lasers: The role of electric-field domain formation for the laser characteristics

被引：29

作者：

Wienold, M. ^{[1
]}

Schrottke, L. ^{[1
]}

Giehler, M. ^{[1
]}

Hey, R. ^{[1
]}

Grahn, H. T. ^{[1
]}

机构：

[1] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 07期

关键词：

SEMICONDUCTOR SUPERLATTICES;

D O I：

10.1063/1.3573504

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on terahertz quantum-cascade lasers exhibiting discontinuities in the continuous-wave (cw) current-voltage and output power characteristics, which are related to the presence of electric-field domains (EFDs). The investigated lasers are based on a GaAs/Al(0.25)Ga(0.75)As heterostructure emitting between 4.2 and 4.4 THz and operate in cw mode up to 50 K. The observed effects related to EFDs are similar to those occurring in weakly coupled superlattices and can be described by the same equations, using an effective drift velocity-field relation. A qualitative agreement between experiments and simulations has been found. (C) 2011 American Institute of Physics. [doi:10.1063/1.3573504]

引用

页数：6

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