Long-term stability of GaAs/AlAs terahertz quantum-cascade lasers

被引：1
|
作者：
Schrottke, L. [1 ]
Lu, X. [1 ]
Biermann, K. [1 ]
Gellie, P. [2 ]
Grahn, H. T. [1 ]
机构：
[1] Paul Drude Inst Festkorperelekt, Leibniz Inst Forschungsverbund Berlin eV, Hausvogteipl 5-7, D-10117 Berlin, Germany
[2] Lytid SAS, 6 Blvd Dubreuil, F-91400 Orsay, France
来源：
AIP ADVANCES | 2022年 / 12卷 / 08期
关键词：
CONTINUOUS-WAVE OPERATION; HIGH-TEMPERATURE; OXIDATION; COMPACT; ALGAAS;
D O I：
10.1063/5.0098782
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have investigated high-performance GaAs/AlAs terahertz (THz) quantum-cascade lasers (QCLs) with respect to the long-term stability of their operating parameters. The output power of lasers that contain an additional, thick AlAs refractive-index contrast layer underneath the cascade structure decreases after three months by about 35%. The deterioration of these lasers is attributed to the oxidation processes in this contrast layer starting from the facets. However, GaAs/AlAs THz QCLs with an Al0.9Ga0.1As refractive-index contrast layer exhibit long-term stability of the operating parameters over many years even when they are exposed to atmospheric conditions. Therefore, these lasers are promising high-power radiation sources in the terahertz spectral region for commercial applications. (C) 2022 Author(s)
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页数：5
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